Hello World

spatlou

Listed Bugs.

spatlou

printf("Hello\n")
//Bug Introduced: Removed Semicolon
hello.c: In function ‘main’:
hello.c:6:2: error: expected ‘;’ before ‘return’
return 0;
======================================

sandeshgupta4u

1.

printf("Hello\n")
Bug Introduced: Removed Semicolon
hello.c: In function ‘main’:
hello.c:6:2: error: expected ‘;’ before ‘return’
return 0;
======================================

sandeshgupta4u

2.
printf();
Bug Introduced: No argument passed
hello.c: In function ‘main’:
hello.c:3:1: error: too few arguments to function ‘printf’
printf();
^~~~~~
In file included from hello.c:1:
/usr/include/stdio.h:318:12: note: declared here
extern int printf (const char *__restrict __format, ...);

======================================

sandeshgupta4u

3.
printf("Hello\n)
//Bug Introduced: Removed double quote
hello.c: In function ‘main’:
hello.c:4:8: warning: missing terminating " character
printf("hello world);
        ^
hello.c:4:8: error: missing terminating " character
printf("hello world);
        ^~~~~~~~~~~~~~
hello.c:5:1: error: expected expression before ‘return’
return 0;
^~~~~~
hello.c:5:10: error: expected ‘;’ before ‘}’ token
return 0;
          ^
          ;
hello.c:7:1:
}
~

======================================

sandeshgupta4u

4.
int main{...};
Bug Introduced: Removed brackets after main
hello.c:3:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
{
^

======================================

sandeshgupta4u

5.
print("Hello World");
Bug Introduced: function name change to print
hello.c: In function ‘main’:
hello.c:4:1: warning: implicit declaration of function ‘print’; did you mean ‘printf’? [-Wimplicit-function-declaration]
print("hello world");
^~~~~
printf
/tmp/ccPDIPf4.o: In function `main':
hello.c:(.text+0xf): undefined reference to `print'
collect2: error: ld returned 1 exit status

======================================

sandeshgupta4u

6.
print("Hello World");
Bug Introduced: function name change to print
hello.c: In function ‘main’:
hello.c:4:1: warning: implicit declaration of function ‘print’; did you mean ‘printf’? [-Wimplicit-function-declaration]
print("hello world");
^~~~~
printf
/tmp/ccPDIPf4.o: In function `main':
hello.c:(.text+0xf): undefined reference to `print'
collect2: error: ld returned 1 exit status

======================================

sandeshgupta4u

7.
#include<stdio>
Bug Introduced: Removed .h from header file
hello.c:1:9: fatal error: stdio: No such file or directory
#include<stdio>
^~~~~~~
compilation terminated.

======================================

sandeshgupta4u

8.
#include
Bug Introduced: Removed filename of header file
hello.c:1:9: error: #include expects "FILENAME" or <FILENAME>
#include
^

=========================================

sandeshgupta4u

9.
return a;
Bug Introduced: Returned 'a' to the main,instead of a int
hello.c: In function ‘main’:
hello.c:5:9: error: ‘a’ undeclared (first use in this function)
return a;
^
hello.c:5:9: note: each undeclared identifier is reported only once for each function it appears in

============================================================================

sandeshgupta4u

10.
void main()
{
return 0;
}

Bug Introduced: Changed return type of main function to void with return 0 used in the program
hello.c: In function ‘main’:
hello.c:5:9: warning: ‘return’ with a value, in function returning void
return 0;
^
hello.c:2:6: note: declared here
void main()
^~~~
==================================================================================================================

sandeshgupta4u

11.
stack main()
Bug Introduced: Changed return type of main function to stack
hello.c:2:1: error: unknown type name ‘stack’; did you mean ‘struct’?
stack main()
^~~~~
struct

========================================================================================================================================================
12.
struct main()
Bug Introduced: Changed return type of main function to struct
hello.c:2:13: error: expected identifier or ‘(’ before ‘)’ token
struct main()
             ^

==============================================================================================================================================================================================
13.
const main()
Bug Introduced: Changed return type of main function to const
hello.c:2:7: warning: return type defaults to ‘int’ [-Wimplicit-int]
const main()
       ^~~~

====================================================================================================================================================================================================================================
14.
printf(Hello World!);
Bug Introduced: Removed double quotes in argument passed in printf
hello.c: In function ‘main’:
hello.c:5:9: error: ‘Hello’ undeclared (first use in this function); did you mean ‘ftello’?
printf(Hello World!);
         ^~~~~
         ftello
hello.c:5:9: note: each undeclared identifier is reported only once for each function it appears in
hello.c:5:14: error: expected ‘)’ before ‘World’
printf(Hello World!);
              ^~~~~~
              )

==========================================================================================================================================================================================================================================================================
15.
int main()
printf(Hello World!);
{}
Bug Introduced: Curly brackets used after printf
hello.c: In function ‘main’:
hello.c:5:2: error: expected declaration specifiers before ‘printf’
printf("Hello World!");
^~~~~~
hello.c:6:2: error: expected declaration specifiers before ‘return’
return 0;
^~~~~~

================================================================================================================================================================================================================================================================================================================

sandeshgupta4u

16.
return 11111111111111111111111110;

Bug Introduced:increased value of return to long int
ello.c: In function ‘main’:
hello.c:5:9: warning: integer constant is too large for its type
return 1111111111111111111111110;
         ^~~~~~~~~~~~~~~~~~~~~~~~~
hello.c:5:9:
warning: overflow in conversion from ‘long int’ to ‘int’ changes value
from ‘8375319363688624582’ to ‘1092383174’ [-Woverflow]

         ^~~~~~~~~~~~~~
=============================================================
17.
main(){}printf();

Bug Introduced:printf used outside main
hello.c:3:11: error: expected declaration specifiers or ‘...’ before string constant
{} printf("Hello World!");
           ^~~~~~~~~~~~~~

==============================================================
18.
main(){} main(){}

Bug Introduced:main used twice
hello.c:6:5: error: redefinition of ‘main’
int main()
     ^~~~
hello.c:2:5: note: previous definition of ‘main’ was here
int main()
     ^~~~
===============================================================
19.
#printf

Bug Introduced:invalid preprocessor directive used
hello.c:2:2: error: invalid preprocessing directive #printf
#printf("");
^~~~~~

=============================================
20.
int min(){}
Bug Introduced:Min used instead of main
/usr/lib/gcc/x86_64-redhat-linux/8/../../../../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status

==========================================

spatlou

well done

sandeshgupta4u

Thank you!

shashanktiwariece

hello.c: In function ‘main’:
hello.c:6:1: error: expected ‘;’ before ‘}’ token

==================================

shashanktiwariece

bug: remove f from printf
/tmp/ccgUB1ff.o: In function `main':
hello.c:(.text+0x11): undefined reference to `print'
collect2: error: ld returned 1 exit status

===========================================
bug: remove main
hello.c:2:8: error: expected identifier or ‘(’ before ‘)’ token

===========================================

bug: remove ()
hello.c:3:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token

========================================================
bug: remove curly bracket after main()
hello.c: In function ‘main’:
hello.c:4:2: error: expected declaration specifiers before ‘printf’
hello.c:5:2: error: expected declaration specifiers before ‘return’
hello.c:6:1: error: expected declaration specifiers before ‘}’ token
hello.c:6:1: error: expected ‘{’ at end of input

========================================================

shashanktiwariece

bug: remove curly bracket after program
hello.c: In function ‘main’:
hello.c:5:2: error: expected declaration or statement at end of input
===================================================

bug: remove "" in printf
hello.c: In function ‘main’:
hello.c:4:9: error: ‘hello’ undeclared (first use in this function)
hello.c:4:9: note: each undeclared identifier is reported only once for each function it appears in
hello.c:4:15: error: expected ‘)’ before ‘world’

=========================================================================

bug: remove #
hello.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

==========================================================

bug: remove h in stdio.h
hello.c:1:17: fatal error: stdio.: No such file or directory
compilation terminated.

=========================================

bug: remove >
hello.c:1:17: error: missing terminating > character

======================================

sachinyadav6122

1.

error: expected ‘;’ at end of input

return 0

^

;

=====================================================================

2.

hello.c:5:2: error: expected declaration or statement at end of input

return 0

^~~~~~

=====================================================================

3.

hello.c:5:10: error: expected ‘;’ at end of input

return 0

^

;

=====================================================================

4.

hello.c:5:2: error: expected declaration or statement at end of input

return 0

;

hello.c:5:2: error: expected declaration or statement at end of input

return 0

^~~~~~

=====================================================================

5.

hello.c:4:2: warning: implicit declaration of function ‘prrintf’; did you mean ‘printf’? [-Wimplicit-function-declaration]

prrintf("hello world");

^~~~~~~

printf

=====================================================================

6..

hello.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]

main()

^~~~

=====================================================================

7.

hello.c:6: error: expected ‘{’ at end of input

}

=====================================================================

8.

hello.c:5:4: error: expected ‘;’ before numeric constant

rn 0;

^~

=====================================================================

sachinyadav6122

9.

hello.c:4:21: error: expected statement before ‘)’ token

printf"hello world");

^

=====================================================================

10.

hello.c:3:1: error: expected declaration specifiers or ‘...’ before ‘{’ token

{

^

=====================================================================

11.

hello.c:1:9: fatal error: stdio.h.: No such file or directory

#include<stdio.h.

^

=====================================================================

12.

printf

/tmp/ccv18xjn.o: In function `main':

hello.c:(.text+0xf): undefined reference to `prinft'

collect2: error: ld returned 1 exit status

=====================================================================

13.

hello.c:4:18: error: missing terminating " character

prinfhello world");

^~~

hello.c:5:9: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘return’

return 0;

=====================================================================

14.

hello.c:3:1: error: expected identifier or ‘(’ before ‘{’ token

{

^

=====================================================================

15.

hello.c:4:22: error: expected ‘;’ before ‘return’

prinf("hello world")

^

;

=====================================================================

16.

hello.c:5:16: error: invalid suffix "f" on integer constant

return 0f;

=====================================================================

sachinyadav6122

17.

hello.c:5:4: error: expected ‘;’ before ‘return’

123 return 0;

^ ~~~~~~

=====================================================================

18.

hello.c:5:10: error: expected ‘;’ before numeric constant

turn 0;

^~

=====================================================================

19.

hello.c:4:2: warning: implicit declaration of function ‘f’ [-Wimplicit-function-declaration]

f("hello world");

^

/tmp/cc0IcZe7.o: In function `main':

hello.c:(.text+0xf): undefined reference to `f'

collect2: error: ld returned 1 exit status

=====================================================================

20.

hello.c:5:10: error: expected ‘;’ before ‘}’ token

retur

^

=====================================================================

21.

hello.c:5:10: error: expected ‘;’ before ‘}’ token

retur

^

=====================================================================

22.

hello.c:5:12: warning: returning ‘char *’ from a function with return type ‘int’ makes integer from pointer without a cast [-Wint-conversion]

return "0";

chahatverma514

1.

error: too few arguments to function ‘printf’

printf();

^~~~~~

===================================================

2.

error: expected identifier or ‘(’ before ‘{’ token

{

===================================================

3.

error: expected ‘;’ before ‘i’

printf i(hello world);

^

===================================================

4.

expected ‘)’ before ‘;’ token

return0;

===================================================

5.

error: missing terminating " character

printf ("hello world):

^~~~~~~~~~~~~~

===================================================

6.

error: ‘return0’ undeclared (first use in this function)

return0:

^~~~~~~

===================================================

7.

error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token

{

^

===================================================

8.

error: unknown type name ‘in’; did you mean ‘int’?

in main

^~

===================================================

chahatverma514

9.

fatal error: stdio,h: No such file or directory

#include<stdio,h>

^~~~~~~~~

===================================================

10.

error: missing terminating > character

#include<stdio.h

^

===================================================

11.

error: expected declaration specifiers or ‘...’ before string constant

printf("hello world/n");

^~~~~~~~~~~~~~~

===================================================

12.

error: expected ‘]’ before ‘;’ token

printf("hello world/n");

^

===================================================

13.

expected ‘const char * restrict’ but argument is of type ‘int’

extern int printf (const char *__restrict __format, ...);

^~~~~~

===================================================

14.

error: expected ‘;’ before ‘return’

return 0;

^~~~~~

===================================================

15.

error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

include<stdio.h>

===================================================

16.

return0’ undeclared (first use in this function)

return0;

^~~~~~~

===================================================

17.

error: invalid preprocessing directive #<

#<stdio.h>

^

===================================================

18.

error: expected declaration specifiers before ‘printf’

printf("hello world/n";

^~~~~~

===================================================

19.

chahatverma514chahatverma514 12:20PM

error: expected declaration specifiers before ‘return’

return 0;

^~~~~~

===================================================

20.

error: unknown type name ‘print’; did you mean ‘int’?

print F("hello world/n";

^~~~~

===================================================

21.

error: expected declaration specifiers before ‘printF’

printF("hello world/n";

^~~~~~

shashanktiwariece

bug: remove <
hello.c:1:10: error: #include expects "FILENAME" or <FILENAME>
hello.c: In function ‘main’:
hello.c:4:2: warning: incompatible implicit declaration of built-in function ‘printf’ [enabled by default]

==========================================================================
bug: remove include
hello.c:1:3: error: invalid preprocessing directive #<
hello.c: In function ‘main’:
hello.c:4:2: warning: incompatible implicit declaration of built-in function ‘printf’ [enabled by default]

=========================================================================

bug: remove stdio.h
hello.c:1:10: error: empty filename in #include
hello.c: In function ‘main’:
hello.c:4:2: warning: incompatible implicit declaration of built-in function ‘printf’ [enabled by default]

=========================================================================

hello.c:1:18: fatal error: stdioh: No such file or directory
compilation terminated.

=========================================

bug: remove "
hello.c: In function ‘main’:
hello.c:4:9: error: ‘hello’ undeclared (first use in this function)
hello.c:4:9: note: each undeclared identifier is reported only once for each function it appears in
hello.c:4:15: error: expected ‘)’ before ‘world’
hello.c:4:20: warning: missing terminating " character [enabled by default]
hello.c:4:15: error: missing terminating " character
hello.c:6:1: error: expected ‘;’ before ‘}’ token

=======================================================================

hello.c: In function ‘main’:
hello.c:5:1: warning: control reaches end of non-void function [-Wreturn-type]

==========================================================

hello.c: In function ‘main’:
hello.c:5:2: warning: ‘return’ with no value, in function returning non-void [-Wreturn-type]

===================================================================

hello.c:2:3: warning: return type defaults to ‘int’ [-Wreturn-type]

================================================

hello.c: In function ‘main’:
hello.c:4:2: warning: statement with no effect [-Wunused-value]

===============================================

akshaymisra97

1) Bug – Removed
semicolon from a printf statement

Error –
expected ‘;’ before ‘return’

2) Bug – Added
semicolon to main function defination

Error –
expected identifier or ‘(‘ before ‘{‘ token

3) Bug – Removed
closing braces of a function

Error –
expected declaration or statement at end of input

4) Bug - # is
removed

Error –
expected ‘=’, ’-’, ’;’, ‘asm’, ‘_attribute_’
before ‘<’ token

5) Bug – main body
is removed

Error - expected
identifier or ‘(‘ before ‘{‘ token

6) Bug – .h is
removed

Error – no
such file or directory

7) Bug – include
keyword is removed

Error –
invalid preprocessing directive

8) Bug –
parenthesis of printf function are removed

Error –
expected ‘;’ before string constant

9) Bug - parenthesis
of main function are removed

Error - expected
‘=’, ’-’, ’;’, ‘asm’, ‘_attribute_’ before ‘<’
token

10) Bug – stdio is
removed

Error - no
such file or directory

11) Bug - < and >
are removed in header declaration

Error -
#include expects “FILENAME” or <FILENAME>

12) Bug – braces
are removed in main body

Error –
expected declaration specifier before ‘printf’ and ‘return’

13) Bug – print is
used instead of printf

Error – ld
returned 1 exit status

14) Bug - : is used
for termination

Error -
expected ‘;’ before ‘:’ token

15) Bug - “ used
to end header declaration instead of >

Error –
missing terminating > character

16) Bug – no space
between return and 0

Error –
return0 undeclared

17) Bug – . is
removed between stdio and h

Error –
stdioh:no such fie or directory

18) Bug –
parenthesis are used to make a block in the main body

Error – main
declared as a function returning a function

19) Bug - * is used
at the beginning of the header declaration

Error -
expected ‘=’, ’-’, ’;’, ‘asm’, ‘_attribute_’
before ‘<’ token

20) Bug - \ is
written in printf argument

Error –
missing terminating “ character

p { margin-bottom: 0.25cm; line-height: 115%; }

lakshyabhardwaj

p { margin-bottom: 0.1in; line-height: 120%; }a:link { }

1. Bug: # removed

Error: expected
‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before
‘<’ token

2. Bug: <
removed

Error: invalid
preprocessing directive #includestdio; did you mean #include?

3. Bug: ( removed

Error: expected
‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before
‘)’ token

4. Bug: { removed

Error: expected
declaration specifiers before ‘}’ token }

5. Bug: f removed

Error: ld
returned 1 exit status

6. Bug: “ removed

Error: missing
terminating " character printf(helllo world \n");

7. Bug: ; removed

Error: expected
‘;’ before ‘return’ return 0;

8. Bug: . removed
from stdio.h

Error: No such
file or directory #include<stdioh>

9. Bug: main removed

Error: expected
identifier or ‘(’ before ‘)’ token int()

10. Bug: h removed
from stdio

Error: stdio.:
No such file or directory #include<stdio.>

11. Bug: print
removed

Error: ld
returned 1 exit status

12. Bug: include
removed

Error: include
‘<stdio.h>’ or provide a declaration of ‘printf’

13. Bug: >
removed

Error: invalid
preprocessing directive #includestdio; did you mean #include?

14. Bug: ) removed

Error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘)’ token

15. Bug: } removed

Error:
expected declaration specifiers before ‘}’ token }

16. Bug: return
spelling mistake

Error: ‘retrn’
undeclared (first use in this function); did you mean ‘rewind’?

17. Bug: ” removed

Error: missing
terminating " character printf(helllo world \n");

p { margin-bottom: 0.1in; line-height: 120%; }

18. Bug: include
spelling mistake

Error: ‘retrn’
undeclared (first use in this function); did you mean ‘rewind'?

p { margin-bottom: 0.1in; line-height: 120%; }

19. Bug: n removed
from\n

Error: missing
terminating " character printf("hello world\");

20. Bug: main
spelling mistake

Error: ld
returned 1 exit status

mohit.singla139

1.

Bug:- Removed # of
header file

Error:- hello.c:1:9:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘<’ token

2.

Bug:- Removed ‘{‘
below int main

Error:- hello.c:9:
error: expected ‘{’ at end of input

3.

Bug:- Removed ‘}’
before return 0

Error:- hello.c: In
function ‘main’:

hello.c:6:1: error:
expected declaration or statement at end of input

4.

Bug:- Removed ‘;’ before return 0

Error:- hello.c: In
function ‘main’:

hello.c:6:9: error:
expected ‘;’ before ‘}’ token

return 0

5.

Bug:- Removed “ in
printf

Error:-
hello.c:5:21: error: missing terminating " character

printf(Hello
Mohit\n");

6.

Bug:- Removed ‘(‘
of main

Error:- hello.c:3:9:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘)’ token

int main)

7.

Bug:- Removed ‘)’
of main

Error:- hello.c:4:1:
error: expected declaration specifiers or ‘...’ before ‘{’
token

{

8.

Bug:- Removed ‘;’
after return 0

Error:- hello.c: In
function ‘main’:

hello.c:6:9: error:
expected ‘;’ before ‘}’ token

9. Removed ‘<’ before stdio.h

Bug:-

Error:-
hello.c:1:10: error: #include expects "FILENAME" or
<FILENAME>

#include stdio.h>

10.

Bug:- wrote in
instead of int

Error:- hello.c:3:1:
error: unknown type name ‘in’; did you mean ‘int’?

in main()

11.

Bug:- Inserted ;
after main()

Error:- hello.c:4:1:
error: expected identifier or ‘(’ before ‘{’ token

{

12.

Bug:- Removed . of
stdio.h

Error:- hello.c:4:1:
error: expected identifier or ‘(’ before ‘{’ token

hello.c:1:10: fatal
error: stdioh: No such file or directory

13.

Bug:- Removed space
between int main

Error:- hello.c:3:1:
warning: return type defaults to ‘int’ [-Wimplicit-int]

intmain()

14.

Bug:- Removed ‘u’
from return

Error:- hello.c:6:1:
error: ‘retrn’ undeclared (first use in this function); did you
mean ‘rewind’?

retrn 0;

15.

Bug:- Removed ‘n’
of main

Error:- hello.c:1:2:
error: invalid preprocessing directive #incude; did you mean
#include?

hello.c: In function
‘min’:

16.

Bug:- Added extra {

Error:- hello.c:1:2:
error: invalid preprocessing directive #incude; did you mean
#include?

#incude <stdio.h>

17.

Bug:- inserted /
extra

Error:- hello.c:2:1:
error: expected identifier or ‘(’ before ‘/’ token

/

18.

Bug:- used ##
instead of #

Error:- hello.c:1:1:
error: stray ‘##’ in program

##include <stdio.h>

19.

Bug:- inserted “
extra in printf

Error:-
hello.c:5:23: warning: missing terminating " character

printf("Hello
Mohit\n"");

20.

Bug:- wrote : after
printf() instead of ;

Error:-
hello.c:5:24: error: expected ‘;’ before ‘:’ token

printf("Hello
Mohit\n"):

p { margin-bottom: 0.1in; line-height: 115%; }

ankitvats846

1 Bug : Remove # from header file

Error : expected =expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘<’ token

2 Bug
: wrote iclude instead of include

Error : invalid preprocessing directive #iclude

3 Bug
: removed “< >” #includestdio.h

Error : error: invalid preprocessing directive #includestdio;

4
Bug : remove “.” #include<stdidh>

Error : fatal error: stdidh: No such file or directory

5
Bug : add terminator “int main():”

Error : error: expected declaration specifiers before ‘:’ token

6
Bug : wrote “it” instead of ‘int” it main()

Error : error: unknown type name ‘it’

7
Bug : removed main function “{“

Error : expected declaration specifiers before ‘}’ token

8
Bug : remove closed bracket “()” printf"hello\n";

Error : expected ‘;’ before string constant

9 Bug
: Removed (“ “) under printf

error : ‘hello’ undeclared (first use in this function);

10 Bug :
Add teminator “:” printf("hello/n");:

“

Error : error: expected expression before ‘:’ token

11 Bug :
Removed “;” printf("hello/n")

Error : expected ‘;’ before ‘return”

12 Bug :
wrote turn instead of return turn 0;

Error
: expected ‘;’ before numeric constant

13 Bug :
wrote “t0” instead of 0

Error : error: ‘t0’ undeclared (first use in this function)

14 Bug :
add 9 between main ()

Error : error: expected declaration specifiers or ‘...’ before
numeric constant

int main(9)

15 Bug :
Missed space between ‘return and 0’

Error : error: ‘returno’ undeclared (first use in this function)

h3.western { font-family: "Liberation Sans", sans-serif; font-size: 14pt; }h3.cjk { font-family: "Source Han Sans CN Regular"; font-size: 14pt; }h3.ctl { font-family: "Lohit Devanagari"; font-size: 14pt; }p { margin-bottom: 0.1in; line-height: 115%; }

jatin98batra

Sorry for late entry.
1.
Bug:
Including an unknown header
Error: fatal
Error: No such file in Directory
2.
Bug:
Not including preprocessor
Error:
expected’=’, ‘,’, ’;’ ‘asm’ or __attribute__
‘before’ ’<’ token include<stdio.h>

3.
Bug: Not
writing “.h” in the end of header file
Error:
No such file in Directory
4.
Bug:
Removing “hash_Include”
Error:expected
identifier or ‘(’ before ‘{’ ‘<’ token <stdio.h>
5.
Bug:
Removed “int main()”
Error:Expected
identifier or ‘(’ before ‘{’ token {

6.
Bug:
Writing a numeric constant as
argument in main( )

Error:
expected declaration specifier or ‘...’ before numeric constant
int main(1)

7.
Bug:
Written “print ” instead of “printf”
Error: No
error just a warning but no executable file is generated

8.
Bug:
Removed ‘ “ ’ from printf statement

Errors:
error: ‘Hello’ undeclared (first use in this function)
printf(Hello World\n");

error: expected ‘)’ before ‘World’ printf(Hello World\n");error: stray ‘\’ in program printf(Hello World\n");

error: missing terminating " character printf(Hello World\n");

error: expected ‘;’ before ‘}’ token }

9.
Bug:
Removed semicolon from printf
statement
Error:
error: expected ‘;’ before ‘return’ return;

10.
Bug: Wrote
any character instead of ‘0’ in ‘return 0’
Error: ‘a’
undeclared (first use in this function) return a;

11.
Bug: Removed
the right parenthesis in function “printf()”

Error:error:
expected ‘)’ before ‘;’ token

printf("Hello World\n";

Basic_Template.c:11:1: error: expected ‘;’
before ‘}’ token

}

12.
Bug: Displaced
the right parenthesis before the closing double quote

Error:error:
expected ‘)’ before ‘;’ token

printf("Hello World\n";
Basic_Template.c:11:1: error: expected ‘;’
before ‘}’ token

}
13.
Bug:
Added the equals to in
between the header file and left angular bracket in header
declaration
Error:
#include expects "FILENAME" or <FILENAME>

#include = <stdio.h>
14.
Bug: Removed
Curly Bracket
Error:
error: expected declaration or statement at end of input
return 0;

15.Bug: Removed
‘.’ and added ‘, ’ in include statement

fatal error: stdio,h:
No such file or directory

#include <stdio,h>
16.
Bug: Removed
‘n’ in the printf statement that was used for the new line
Error:error:
expected expression before ‘return’

return 0;

Basic_Template.c:9:1: error: expected ‘;’
before ‘}’ token

17.
Bug: Adding
another curly brace in the end of the block
Error: expected identifier or ‘(’
before ‘}’ token }

18.
Bug: Adding
‘ ) ’ (right parenthesis) instead of curly brace
Error:
error: expected statement
before ‘)’ token )
error:
expected declaration or statement at end of input

jatin98batra

Last 2 :
19.
Bug: Used colon instead of semicolon
Error:error: expected ‘;’ before ‘:’ token
return 0:
20.
Bug:Incomplete comment used a single backslash , unintentionally
Error: error: expected expression before ‘/’ token
/return 0;

icbansalthana1074

Bug – remove
‘#’ from program,

1 error - expected
‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before
‘<’ token

bug – remove
‘\’

2 stray ‘\’ in
program

printf("hello
world"\)

bug: remove ‘
n’

3 expected ‘;’
before ‘return’

printf("hello
world"\)

bug: missing
‘”’ after \

4 missing
terminating " character

printf("hello world\");

bug:remove ‘;’after printf

5 expected
expression before ‘return’

return 0 ;

bug missing
termination sign i.e. ;

6 expected ‘;’
before ‘}’ token

return 0 ;

bug: remove
‘{‘after main

7 expected
declaration or statement at end of input

bug: retn used
instead of return

8 retn’
undeclared (first use in this function); did you mean ‘getw’?

Retn 0;

bug:add ‘else
if’ before printf

9 ‘else’
without a previous ‘if’

else
ifprintf("hello world \n");

bug: remove ‘;’
at the end of int main

10 expected ‘;’
before numeric constant

retur 0;

bug
Adding

‘ ) ’ (right parenthesis) instead of curly brace

11;error:
expected statementbefore ‘)’ token )

Bug: Used colon instead of semicolon

12Error:error:
expected ‘;’ before ‘:’ token

return 0:

bug:remvoe ‘ “’ in hello world world in print

13 hello’ undeclared (first use in this function); did you

mean ‘ftello’? printf(hello world \n");

bug:remove ‘print’

14 expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘<’ token

include<stdio.h>

bug:add extra bracket outside the closing main function ‘}’

15 expected identifier or ‘(’ before ‘return’

return 0;

bug: remove ‘return 0’ from program

16 expected identifier or ‘(’ before ‘}’ token

}

bug: add an extra brecket befor starting the program

17 expected identifier or ‘(’ before ‘{’ token

{include<stdio.h>

bug:add conio .h in program

18 conio.h: No such file or directory

#include<conio.h>

bug: add ‘while loop’ in program

19 expected expression before ‘)’ token

while()

bug:add ‘do while loop’in program

20 expected declaration or statement at end of input

}

bug:add ‘extra\’ in

21 stray ‘\’ in program

enter elements (asjdf\\\\\\\\\\)

p { margin-bottom: 0.1in; line-height: 115%; }a:link { }

vikas.talan

21

satinder.joshi1991

ERROR:1

REMOVE:#

BUG:sam.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’
or ‘__attribute__’ before ‘<’ token

include<stdio.h>

^

ERROR:2

REMOVE:() FROM INT MAIN

BUG:sam.c:3:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’
or ‘__attribute__’ before ‘{’ token

{

^

ERROR:3

REMOVE 0:

BUG:sam.c: In function ‘main’:

sam.c:5:1: warning: ‘return’ with no value, in function
returning non-void

return ;

^~~~~~

sam.c:2:5: note: declared here

int main()

^~~~

ERROR:4

REMOVE . FROM #INCLUDE<STDIO.H>

BUG:sam.c:1:9: fatal error: stdioh: No such file or directory

#include<stdioh>

^~~~~~~~

compilation terminated.

ERROR:5

REMOVE >from stdio.h>

BUG:sam.c:1:17: error: missing terminating > character

#include<stdio.h

^

ERROR:6

REMOVE < FROM #INCLUDE <STDIO.H>

BUG:sam.c:1:2: error: invalid preprocessing directive
#includestdio; did you mean #include?

#includestdio.h>

^~~~~~~~~~~~

include

sam.c: In function ‘main’:

sam.c:4:1: warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("hello everyone/n");

^~~~~~

sam.c:4:1: warning: incompatible implicit declaration of built-in
function ‘printf’

sam.c:4:1: note: include ‘<stdio.h>’ or provide a
declaration of ‘printf’

ERROR:7

p { margin-bottom: 0.25cm; line-height: 120%; }

vinaysehrawat92

1.ERROR-Removed #
from first statement

BUG-vinay.c:1:8:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘<’ token

include<stdio.h>

^

2.ERROR-Removed <
from first statement

BUG-vinay.c:1:2:
error: invalid preprocessing directive #includestdio; did you mean
#include?

#includestdio.h>

^~~~~~~~~~~~

include

vinay.c: In
function ‘main’:

vinay.c:4:1:
warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf
("helloworld/n");

^~~~~~

vinay.c:4:1:
warning: incompatible implicit declaration of built-in function
‘printf’

vinay.c:4:1:
note: include ‘<stdio.h>’ or provide a declaration of
‘printf’

3.ERROR-Removed
. From stdio.h

BUG-vinay.c:1:9:
fatal error: stdioh: No such file or directory

#include<stdioh>

^~~~~~~~

compilation
terminated.

4.ERROR-Removed >
from <stdio.h>

BUG-vinay.c:1:17:
error: missing terminating > character

#include<stdio.h

5.ERROR-Removed
( after the word main

BUG-vinay.c:2:9:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘)’ token

int main)

6.ERROR-Removed )
after main

BUG-vinay.c:3:1:
error: expected declaration specifiers or ‘...’ before ‘{’
token

{

^

7.ERROR-Removed {
above printf

BUG-vinay.c: In
function ‘main’:

vinay.c:4:1:
error: expected declaration specifiers before ‘printf’

printf
("helloworld/n");

^~~~~~

vinay.c:5:1:
error: expected declaration specifiers before ‘return’

return 0;

^~~~~~

vinay.c:6:1:
error: expected declaration specifiers before ‘}’ token

}

^

vinay.c:6:1:
error: expected ‘{’ at end of input

8.ERROR-Removed (
before helloworld

BUG-vin.c: In
function ‘main’:

vin.c:4:7: error:
expected ‘;’ before string constant

printf"helloworld/n");

^~~~~~~~~~~~~~

vin.c:4:21:
error: expected statement before ‘)’ token

printf"helloworld/n");

^

9.ERROR-Removed )
after helloworld

BUG-vin.c: In
function ‘main’:

vin.c:4:22:
error: expected ‘)’ before ‘;’ token

printf("helloworld/n";

^

vin.c:6:1: error:
expected ‘;’ before ‘}’ token

}

^

10.ERROR-Removed
; after helloworld

BUG-vin.c: In
function ‘main’:

vin.c:5:1: error:
expected ‘;’ before ‘return’

return 0;

^~~~~~

satinder.joshi1991

ERROR:7

REMOVE {

BUG:sam.c: In function ‘main’:

sam.c:4:1: error: expected declaration specifiers before ‘printf’

printf("hello everyone/n");

^~~~~~

sam.c:5:1: error: expected declaration specifiers before ‘return’

return 0 ;

^~~~~~

sam.c:6:1: error: expected declaration specifiers before ‘}’
token

}

^

sam.c:6:1: error: expected ‘{’ at end of input

ERROR:8

REMOVE }

BUG:sam.c: In function ‘main’:

sam.c:5:1: error: expected declaration or statement at end of
input

return 0 ;

^~~~~~

ERROR:9

REMOVE: “

BUG:sam.c: In function ‘main’:

sam.c:4:8: error: ‘hello’ undeclared (first use in this
function); did you mean ‘ftello’?

printf(hello everyone/n");

^~~~~

ftello

sam.c:4:8: note: each undeclared identifier is reported only once
for each function it appears in

sam.c:4:14: error: expected ‘)’ before ‘everyone’

printf(hello everyone/n");

^~~~~~~~

sam.c:4:24: warning: missing terminating " character

printf(hello everyone/n");

^

sam.c:4:24: error: missing terminating " character

printf(hello everyone/n");

^~~

sam.c:6:1: error: expected ‘;’ before ‘}’ token

}

^

ERROR:10

REMOVE ; FROM RETURN 0;

BUG:sam.c: In function ‘main’:

sam.c:6:1: error: expected ‘;’ before ‘}’ token

}

^

ERROR:11

REMOVE ; FROM PRINT F

BUG:sam.c: In function ‘main’:

sam.c:5:1: error: expected ‘;’ before ‘return’

return 0;

^~~~~~

ERROR:12

NO SPACE BETWEEN RETURN 0

BUG:sam.c: In function ‘main’:

sam.c:5:1: error: ‘return0’ undeclared (first use in this
function)

return0 ;

^~~~~~~

sam.c:5:1: note: each undeclared identifier is reported only once
for each function it appears in

ERROR:13

REMOVE F FROM PRINT F

BUG:sam.c: In function ‘main’:

sam.c:4:1: warning: implicit declaration of function ‘print’;
did you mean ‘printf’? [-Wimplicit-function-declaration]

print("hello everyone/n");

^~~~~

printf

/tmp/ccR5AnbG.o: In function `main':

sam.c:(.text+0xf): undefined reference to `print'

collect2: error: ld returned 1 exit

p { margin-bottom: 0.25cm; line-height: 120%; }

satinder.joshi1991

ERROR:14

REMOVE .H FROM # INCLUDE STDIO.H

BUG:sam.c:1:9: fatal error: stdio: No such file or directory

#include<stdio>

^~~~~~~

compilation terminated.

ERROR:15

REMOVE INT FROM INT MAIN()

BUG:sam.c:2:2: warning: return type defaults to ‘int’
[-Wimplicit-int]

main()

^~~~

ERROR:16

REMOVE THE BREACKET () FROM (HELLO WORLD)

BUG:sam.c: In function ‘main’:

sam.c:4:7: error: expected ‘;’ before string constant

printf"hello everyone/n";

^~~~~~~~~~~~~~~~~~

ERROR:17

NO SPACE BETWEEN RETURN 0

BUG:sam.c: In function ‘main’:

sam.c:5:1: error: ‘return0’ undeclared (first use in this
function)

return0 ;

^~~~~~~

sam.c:5:1: note: each undeclared identifier is reported only once
for each function it appears in

ERROR:18

REMOVE N” FROM PRINT F (HELLO WORLD/N”);

BUG:sam.c: In function ‘main’:

sam.c:4:8: warning: missing terminating " character

printf("hello everyone/);

^

sam.c:4:8: error: missing terminating " character

printf("hello everyone/);

^~~~~~~~~~~~~~~~~~

sam.c:5:1: error: expected expression before ‘return’

return 0;

^~~~~~

sam.c:6:1: error: expected ‘;’ before ‘}’ token

}

^

ERROR:19

SPACE BETWEEN PRINT F

BUG:sam.c: In function ‘main’:

sam.c:4:1: error: unknown type name ‘print’; did you mean
‘int’?

print f("hello everyone/n");

^~~~~

int

sam.c:4:9: error: expected declaration specifiers or ‘...’
before string constant

print f("hello everyone/n");

^~~~~~~~~~~~~~~~~~

ERROR:20

REMOVE ) FROM INT MAIN()

BUG:sam.c:3:1: error: expected declaration specifiers or ‘...’
before ‘{’ token

{

^

p { margin-bottom: 0.25cm; line-height: 120%; }

vinaysehrawat92

11.ERROR-Removed
0 after return

BUG-vin.c: In
function ‘main’:

vin.c:5:1:
warning: ‘return’ with no value, in function returning non-void

return ;

^~~~~~

vin.c:2:5: note:
declared here

int main()

^~~~

12.ERROR-Removed
; after return 0

BUG-vin.c: In
function ‘main’:

vin.c:6:1: error:
expected ‘;’ before ‘}’ token

}

^

13.ERROR-Removed
last }

BUG-vin.c: In
function ‘main’:

vin.c:5:1: error:
expected declaration or statement at end of input

return 0;

^~~~~~

14.ERROR-spelling
error in include

BUG-vin.c:1:2:
error: invalid preprocessing directive #nclude; did you mean
#include?

#nclude<stdio.h>

^~~~~~

include

vin.c: In
function ‘main’:

vin.c:4:1:
warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("helloworld/n");

^~~~~~

vin.c:4:1:
warning: incompatible implicit declaration of built-in function
‘printf’

vin.c:4:1: note:
include ‘<stdio.h>’ or provide a declaration of ‘printf’

15.ERROR-NO space
given between int and main

BUG-vin.c:2:1:
warning: return type defaults to ‘int’ [-Wimplicit-int]

intmain()

^~~~~~~

/usr/lib/gcc/x86_64-redhat-linux/7/../../../../lib64/crt1.o:
In function `_start':

(.text+0x20):
undefined reference to `main'

collect2: error:
ld returned 1 exit status

16.ERROR-Removed
f from printf

BUG-vin.c: In
function ‘main’:

vin.c:4:1:
warning: implicit declaration of function ‘print’; did you mean
‘printf’? [-Wimplicit-function-declaration]

print
("helloworld/n");

^~~~~

printf

/tmp/cc1CZWAf.o:
In function `main':

vin.c:(.text+0xf):
undefined reference to `print'

collect2: error:
ld returned 1 exit status

17.ERROR-No space
given between return and 0

BUG-vin.c: In
function ‘main’:

vin.c:5:1: error:
‘return0’ undeclared (first use in this function)

return0;

^~~~~~~

vin.c:5:1: note:
each undeclared identifier is reported only once for each function it
appears in

18.ERROR-Removed
int main() from the program

BUG-vin.c:3:1:
error: expected identifier or ‘(’ before ‘{’ token

{

^

19.ERROR-Removed
both { from the program

BUG-vin.c: In
function ‘main’:

vin.c:4:1: error:
expected declaration specifiers before ‘printf’

printf
("helloworld/n");

^~~~~~

vin.c:5:1: error:
expected declaration specifiers before ‘return’

return 0;

^~~~~~

vin.c:5:1: error:
expected ‘{’ at end of input

20.ERROR-Removed
both the ; in the program

BUG-vin.c: In
function ‘main’:

vin.c:5:1: error:
expected ‘;’ before ‘return’

return 0

^~~~~~

p { margin-bottom: 0.25cm; line-height: 120%; }

ranjan.amit29

Error:1

Removed .
From stdio.h statement

Bug:
helo.c:2:9: fatal error: stdioh: No such file or directory

#include<stdioh>

^~~~~~~~

compilation
terminated.

Error:2

Removed
#
from the 1^st
line

Bug:
helo.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’
or ‘__attribute__’ before ‘<’ token

include<stdio.h>

Error:3

Removed
space from int main

Bug:
helo.c:2:1: warning: return type defaults to ‘int’
[-Wimplicit-int]

intmain()

^~~~~~~

/usr/lib/gcc/x86_64-redhat-linux/7/../../../../lib64/crt1.o:
In function `_start':

(.text+0x20):
undefined reference to `main'

collect2:
error: ld returned 1 exit status

Error
:4

Removed
{ from the statement

Bug:
helo.c: In function ‘main’:

helo.c:4:1:
error: expected declaration specifiers before ‘printf’

printf("welcome
to new york/n");

^~~~~~

helo.c:5:1:
error: expected declaration specifiers before ‘return’

return
0;

^~~~~~

helo.c:6:1:
error: expected declaration specifiers before ‘}’ token

}

^

helo.c:6:1:
error: expected ‘{’ at end of input

Error:5

Put
space in prinf statement

Bug:
helo.c: In function ‘main’:

helo.c:3:1:
error: expected declaration specifiers before ‘}’ token

}

^

helo.c:5:1:
error: unknown type name ‘print’; did you mean ‘int’?

print f("welcome to
new york/n");

^~~~~

int

helo.c:5:9:
error: expected declaration specifiers or ‘...’ before string
constant

print f("welcome to
new york/n");

^~~~~~~~~~~~~~~~~~~~~~~

helo.c:6:1:
error: expected declaration specifiers before ‘return’

return 0;

^~~~~~

helo.c:7:1:
error: expected declaration specifiers before ‘}’ token

}

^

helo.c:7:1:
error: expected ‘{’ at end of input

p { margin-bottom: 0.25cm; line-height: 120%; }

ranjan.amit29

Error:6

Removed
; from the statement

Bug:
amit.c: In function ‘main’:

amit.c:6:1:
error: expected ‘;’ before ‘return’

return
0;

^~~~~~

Error:7

Removed
“ from the statement

Bug:amit.c:
In function ‘main’:

amit.c:5:8:
error: ‘hello’ undeclared (first use in this function); did you
mean ‘ftello’?

printf(hello
nyc/n");

^~~~~

ftello

amit.c:5:8:
note: each undeclared identifier is reported only once for each
function it appears in

amit.c:5:14:
error: expected ‘)’ before ‘nyc’

printf(hello
nyc/n");

^~~

amit.c:5:19:
warning: missing terminating " character

printf(hello
nyc/n");

amit.c:5:19:
error: missing terminating " character

printf(hello
nyc/n");

amit.c:8:1:
error: expected ‘;’ before ‘}’ token}

Error:8

Removed
0 from return 0

Bug:
amit.c: In function ‘main’:

amit.c:6:1:
warning: ‘return’ with no value, in function returning non-void

return;

^~~~~~

amit.c:3:5:
note: declared here

int
main()

^~~~

Error:9

Removed
() from int main

Bug:amit.c:4:1:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘{’ token

{^

Error:10

Removed
> from the first line

Bug:amit.c:2:17:
error: missing terminating > character

#include<stdio.h^

Error
:11

spelling
mistake in int main

Bug:
/usr/lib/gcc/x86_64-redhat-linux/7/../../../../lib64/crt1.o: In
function `_start':

(.text+0x20):
undefined reference to `main'

collect2:
error: ld returned 1 exit status

Error:12

Removed
space done in int main
function

Bug:amit.c:3:1:
warning: return type defaults to ‘int’ [-Wimplicit-int]

intmain()

/usr/lib/gcc/x86_64-redhat-linux/7/../../../../lib64/crt1.o:
In function `_start':(.text+0x20):
undefined reference to `main'

collect2:
error: ld returned 1 exit status

Error:13

Removed
; from return 0; function

Bug:amit.c:
In function ‘main’:

amit.c:8:1:
error: expected ‘;’ before ‘}’ token

}

utkarshraj273

Error 1:- include<stdio.h> (# missing) Hello.c:2:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token include<stdio.h>

p { margin-bottom: 0.25cm; line-height: 120%; }p { margin-bottom: 0.25cm; line-height: 120%; }p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 2- main is removed [int ………... ()] Hello.c:3:6: error: expected identifier or ‘(’ before ‘)’ token int ()

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 3: f is removed from printf Hello.c: In function ‘main’: Hello.c:6:1: warning: implicit declaration of function ‘print’; did you mean ‘printf’? [-Wimplicit-function-declaration] print("Hello\n"); ^~~~~ printf /tmp/ccRSgTUC.o: In function `main': Hello.c:(.text+0xf): undefined reference to `print' collect2: error: ld returned 1 exit status Error 4:- Curly Braces are removed from the end of program. Hello.c: In function ‘main’: Hello.c:7:3: error: expected declaration or statement at end of input return 0;

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 5:- removed braces from Hello Hello.c: In function ‘main’: Hello.c:6:7: error: expected ‘;’ before string constant printf"Hello\n" Error 6:- printf("Hello\n)"; Hello.c: In function ‘main’: Hello.c:6:18: error: expected ‘)’ before ‘;’ token printf("Hello\n)"; ^ Hello.c:9:1: error: expected ‘;’ before ‘}’ token

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 5:-
removed braces from H

p { margin-bottom: 0.25cm; line-height: 120%;

Hello.c: In function ‘main’:

Hello.c:6:7: error: expected ‘;’ before string constant

printf"Hello\n"

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error
6:- printf("Hello\n)":

Hello.c: In function ‘main’:

Hello.c:6:18: error: expected ‘)’ before ‘;’ token

printf("Hello\n)";

^

Hello.c:9:1: error: expected ‘;’ before ‘}’ token

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 7:- int
main…... (braces missing)

Hello.c:3:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘{’ token

{

^

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 8:- ……..main()
(int is missing)

Hello.c:3:2:
warning: return type defaults to ‘int’ [-Wimplicit-int]

main()

Error 9:- Semicolon removed

#include
<stdio.h>

int
main()

{

printf("hello\n")

return 0

}

Hello.c: In function
‘main’:

Hello.c:5:3: error:
expected ‘;’ before ‘return’

return 0

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 10:-
#include<stdioh> ( dot missing before h)

Hello.c:1:9: fatal error: stdioh: No such file or directory

#include<stdioh>

^~~~~~~~

compilation terminated.

Error
11:- #includestdio.h (bracses <> are missing)

Hello.c:1:2: error: invalid preprocessing directive #includestdio;
did you mean #include?

#includestdio.h

^~~~~~~~~~~~

include

Hello.c: In function ‘main’:

Hello.c:5:1: warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("Hello\n");

^~~~~~

Hello.c:5:1: warning: incompatible implicit declaration of built-in
function ‘printf’

Hello.c:5:1: note: include ‘<stdio.h>’ or provide a
declaration of ‘printf’

Error
12:- return ; (zero removed)

Hello.c: In function ‘main’:

Hello.c:6:3: warning: ‘return’ with no value, in function
returning non-void

return ;

^~~~~~

Hello.c:2:5: note: declared here

int main()

^~~

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 13:- f("Hello\n"); (print is
removed from printf)

Hello.c: In function ‘main’:

Hello.c:5:1: warning: implicit declaration of function ‘f’
[-Wimplicit-function-declaration]

f("Hello\n");

^

/tmp/ccqX7hUH.o: In function `main':

Hello.c:(.text+0xf): undefined reference to `f'

collect2: error: ld returned 1 exit status

Error
14 :- printf(Hello\n); (double qoutes removed)

Hello.c: In function ‘main’:

Hello.c:5:13: error: stray ‘\’ in program

printf(Hello\n);

^

Hello.c:5:8: error: ‘Hello’ undeclared (first use in this
function); did you mean ‘ftello’?

printf(Hello\n);

^~~~~

ftello

Hello.c:5:8: note: each undeclared identifier is reported only once
for each function it appears in

Hello.c:5:14: error: expected ‘)’ before ‘n’

printf(Hello\n)

Error 15:- ( int
main removed )

#include<stdio.h>)

{

printf("Hello\n");

return 0 ;

}

Hello.c:2:1: error: expected identifier or ‘(’ before ‘{’
token

Error 16:-
#include (header file <stdio.h> removed)

Hello.c:1:9: error: #include expects "FILENAME" or
<FILENAME>

#include

^

Hello.c: In function ‘main’:

Hello.c:5:1: warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("Hello\n");

^~~~~~

Hello.c:5:1: warning: incompatible implicit declaration of built-in
function ‘printf’

Hello.c:5:1: note: include ‘<stdio.h>’ or provide a
declaration of ‘printf’

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 17:-
(#include <stdio.h> is removed)

int main()

{

printf("Hello\n");

return 0 ;

}

Hello.c: In function ‘main’:

Hello.c:5:1: warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("Hello\n");

^~~~~~

Hello.c:5:1: warning: incompatible implicit declaration of built-in
function ‘printf’

Hello.c:5:1: note: include ‘<stdio.h>’ or provide a
declaration of ‘printf’

Error 18:- (curly
braces removed)

#include<stdio.h>

int main()

printf("hello\n");

return 0;

Hello.c: In function ‘main’:

Hello.c:4:1: error: expected declaration specifiers before ‘printf’

printf("hello\n");

^~~~~~

Hello.c:5:2: error: expected declaration specifiers before ‘return’

return 0;

^~~~~~

Hello.c:5:2: error: expected ‘{’ at end of input

p { margin-bottom: 0.25cm; line-height: 120%; }p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

utkarshraj273

Error 19: Removed
starting both lines

{

printf("hello\n");

return 0;

}

Hello.c:2:1: error: expected identifier or ‘(’ before ‘{’
token

{

Error 20:-
#includ <stdio.h>

(e is missing
from include)

Hello.c:1:2: error: invalid preprocessing directive #includ; did you
mean #include?

#includ <stdio.h>

^~~~~~

include

Hello.c: In function ‘main’:

Hello.c:4:1: warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("hello\n");

^~~~~~

Hello.c:4:1: warning: incompatible implicit declaration of built-in
function ‘printf’

Hello.c:4:1: note: include ‘<stdio.h>’ or provide a
declaration of ‘printf’.

p { margin-bottom: 0.25cm; line-height: 120%; }p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

p { margin-bottom: 0.25cm; line-height: 120%; }

kumar1991rakesh

@page { margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 120% }

ERROR:1

hello.c: In
function ‘main’:

hello.c:7:1: error:
expected ‘;’ before ‘}’ token

}

ERROR :2

hello.c:7:1: error:
expected ‘)’ before ‘}’ token

}

^

ERROR3

hello.c:7:1: error:
expected ‘;’ before ‘}’ tokenhello.c:4:14: error: stray ‘\’
in program

printf(Hello\n");

^

hello.c:4:9: error:
‘Hello’ undeclared (first use in this function); did you mean
‘ftello’?

printf(Hello\n");

^~~~~

ftello

hello.c:4:9: note:
each undeclared identifier is reported only once for each function it
appears in

hello.c:4:15: error:
expected ‘)’ before ‘n’

printf(Hello\n");

^

hello.c:4:16:
warning: missing terminating " character

printf(Hello\n");

^

hello.c:4:16: error:
missing terminating " character

printf(Hello\n");

^~~

hello.c:7:1: error:
expected ‘;’ before ‘}’ token

}

^

ERROR:4

hello.c:4:8: error:
expected ‘;’ before string constant

printf"Hello\n");

^~~~~~~~~

hello.c:4:17: error:
expected statement before ‘)’ token

printf"Hello\n");

ERROR:5

hello.c: In function
‘main’:

hello.c:4:2: error:
expected declaration or statement at end of input

printf("Hello\n");

^~~~~~

ERROR:6

hello.c: In function
‘main’: ^

hello.c:4:2: error:
expected declaration or statement at end of input

printf("Hello\n");

^~~~~~

[root@localhost
basic.c]# vim hello.c

[root@localhost
basic.c]# gcc hello.c

hello.c: In function
‘main’:

hello.c:4:2: error:
expected declaration specifiers before ‘printf’

printf("Hello\n");

^~~~~~

hello.c:7:1: error:
expected declaration specifiers before ‘}’ token

}

^

hello.c:7:1: error:
expected ‘{’ at end of input

ERROR:7

hello.c:2:9: error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘)’ token

int main)

^

ERROR:8

hello.c:2:9: error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘)’ token

int main)

^

[root@localhost
basic.c]# vim hello.c

[root@localhost
basic.c]# gcc hello.c

hello.c:2:1: error:
unknown type name ‘in’; did you mean ‘int’?

in main()

^~

int

ERROR:9

hello.c:1:9: fatal
error: stdi.h: No such file or directory

#include<stdi.h>

^~~~~~~~

ERROR:10

hello.c:2:1: error:
unknown type name ‘nt’; did you mean ‘int’?

nt main()

^~

shubham.ec11

Error in hello word program

1. miss in
closing “ in hello string

Error:

test.c:5:10: warning: missing terminating " character

printf("hello);

^

test.c:5:10: error: missing terminating " character

printf("hello);

^~~~~~~~

test.c:7:3: error: expected expression before ‘return’

return 0;

^~~~~~

test.c:9:1: error: expected ‘;’ before ‘}’ token

}

^

2. miss in
semicolom ; in printf function

error:

test.c: In function ‘main’:

test.c:7:3: error: expected ‘;’ before ‘return’

return 0;

3. miss ‘int
‘constant in main function

error:

est.c:3:2: warning: return type defaults to ‘int’
[-Wimplicit-int]

main(){

^~~~

test.c: In function ‘main’:

test.c:7:3: error: expected ‘;’ before ‘return’

return 0;

^~~~~~

4. miss ‘0’
in return function

error:

test.c:3:2: warning: return type defaults to ‘int’
[-Wimplicit-int]

main(){

^~~~

test.c: In function ‘main’:

test.c:8:3: warning: ‘return’ with no value, in function
returning non-void

return ;

^~~~~~

test.c:3:2: note: declared here

main(){

^~~~

5. miss the end
of the ‘}’ in function

error:

test.c:7:3: error: expected declaration or statement at end of input

return
0;

6.miss close ’)’
after int main function

error:

test.c:3:10: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘)’ token

int main){

7. miss ‘.h’
header in include function

error:

test.c:1:9: fatal error: stdio.: No such file or directory

#include<stdio.>

^~~~~~~~

kumar1991rakesh

@page { margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 120% }

ERROR:11

hello.c:2:1: error:
unknown type name ‘it’; did you mean ‘int’?

it main()

^~

int

ERROR:12

hello.c:1:9: fatal
error: sdio.h: No such file or directory

#include<sdio.h>

^~~~~~~~

ERROR:13

hello.c:1:9: fatal
error: stio.h: No such file or directory

#include<stio.h>

^~~~~~~~

ERROR:13

hello.c:1:9: fatal
error: stdio.: No such file or directory

#include<stdio.>

^~~~~~~~

ERROR:14

hello.c:1:9: fatal
error: stdioh: No such file or directory

#include<stdioh>

^~~~~~~~

ERROR:15

hello.c:1:9: fatal
error: stdioh: No such file or directory

#include<stdioh>

^~~~~~~~

ERROR:16

hello.c: In function
‘main’:

hello.c:7:1: error:
expected ‘;’ before ‘}’ token

}

^

ERROR:17

hello.c: In function
‘main’:

hello.c:3:1: error:
expected declaration specifiers before ‘)’ token

)

ERROR:18

hello.c:1:8: error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘<’ token

include<stdio.h>

^

ERROR:19

hello.c:1:2: error:
invalid preprocessing directive #includestdio; did you mean #include?

#includestdio.h>

^~~~~~~~~~~~

ERROR:20

hello.c: In function
‘main’:

hello.c:4:14: error:
stray ‘\’ in program

printf(Hello\n);

^

hello.c:4:9: error:
‘Hello’ undeclared (first use in this function); did you mean
‘ftello’?

printf(Hello\n);

^~~~~

ftello

hello.c:4:9: note:
each undeclared identifier is reported only once for each function it
appears in

hello.c:4:15: error:
expected ‘)’ before ‘n’

printf(Hello\n);

^

shubham.ec11

7. miss ‘.h’
header in include function

error:

test.c:1:9: fatal error: stdio.: No such file or directory

#include<stdio.>

^~~~~~~~

8.miss ‘#’ in
include header file

error:

test.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘<’ token

include<stdio.h>

^

9. miss ‘output’
in ‘stdio’ header file

error:

test.c:1:9: fatal error: stdi.h: No such file or directory

#include<stdi.h>

^~~~~~~~

10. using ‘R’
instead of ‘r’ in ‘return’ function

error:

test.c:7:2: error: ‘Return’ undeclared (first use in this
function)

Return 0;

^~~~~~

test.c:7:2: note: each undeclared identifier is reported only once
for each function it appears in

test.c:7:9: error: expected ‘;’ before numeric constant

Return 0;

11: bug in
include<stdio h>

Q1.c:1:9: fatal error: stdio h: No such file or directory

#include<stdio h>

^~~~~~~~~

12: missin n in
new line \n in printf function

Q1.c: In function ‘main’:

Q1.c:4:9: warning: missing terminating " character

printf("hello world\");

^

Q1.c:4:9: error: missing terminating " character

printf("hello world\");

^~~~~~~~~~~~~~~~

Q1.c:5:2: error: expected expression before ‘return’

return 0;

^~~~~~

Q1.c:6:1: error: expected ‘;’ before ‘}’ token

}

^~~~~~

p { margin-bottom: 0.25cm; line-height: 120%; }

shubham.ec11

13: use single quote ‘ ‘ instead of “ ” in printf
function

Q1.c:4:9: warning: character constant too long for its type

printf('hello world\n');

^~~~~~~~~~~~~~~

Q1.c:4:9: warning: passing argument 1 of ‘printf’ makes pointer
from integer without a cast [-Wint-conversion]

In file included from Q1.c:1:0:

/usr/include/stdio.h:318:12: note: expected ‘const char * restrict’
but argument is of type ‘int’

extern int printf (const char *__restrict __format, ...);

^~~~~~

[root@localhost assignment1]# vim Q1.c

[root@localhost assignment1]# gcc Q1.c

Q1.c: In function ‘main’:

Q1.c:4:9: warning: character constant too long for its type

printf('hello world\n');

^~~~~~~~~~~~~~~

Q1.c:4:9: warning: passing argument 1 of ‘printf’ makes pointer
from integer without a cast [-Wint-conversion]

In file included from Q1.c:1:0:

/usr/include/stdio.h:318:12: note: expected ‘const char * restrict’
but argument is of type ‘int’

extern int printf (const char *__restrict __format, ...);

^~~~~~

14: bug } in
printf function

Q1.c:4:24: error: expected ‘)’ before ‘}’ token

printf("hello world\n"};

^

Q1.c:4:24: error: expected ‘;’ before ‘}’ token

Q1.c: At top level:

Q1.c:5:2: error: expected identifier or ‘(’ before ‘return’

return 0;

^~~~~~

Q1.c:6:1: error: expected identifier or ‘(’ before ‘}’ token

}

15: use ] in
closing stetement in main function

Q1.c:6:1: error: expected statement before ‘]’ token

]

^

Q1.c:6:1: error: expected declaration or statement at end of input

p { margin-bottom: 0.25cm; line-height: 120%; }

shubham.ec11

16: use ; after
main()

Q1.c:3:1: error: expected identifier or ‘(’ before ‘{’ token

{

^

17: use { before
main function

Q1.c:2:1: error: expected identifier or ‘(’ before ‘{’ token

{

^

18: do space b/w
std and io(standard input output)

Q1.c:1:9: fatal error: std io.h: No such file or directory

#include<std io.h>

^~~~~~~~~~

compilation terminated.

19: use I in
include

Q1.c:1:2: error: invalid preprocessing directive #Include; did you
mean #include?

#Include<stdi

include

Q1.c: In function ‘main’:

Q1.c:5:2: warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("hello world\n");

^~~~~~

Q1.c:5:2: warning: incompatible implicit declaration of built-in
function ‘printf’

Q1.c:5:2: note: include ‘<stdio.h>’ or provide a
declaration of ‘printf’

20: missing ‘t’
in int keyword

Q1.c:2:1: error: unknown type name ‘in’; did you mean ‘int’?

in main()

^~

int

p { margin-bottom: 0.25cm; line-height: 120%; }

pushpendra100991

p { margin-bottom: 0.1in; line-height: 120%; }

1. Bug: Remove
terminating character >

Error :
hello.c:1:17: error: missing terminating > character

#include<stdio.h

2. 1. Bug: Remove #

Error: hello.c:1:8:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘<’ token

include<stdio.h>

3. Bug : Remove
Curly bracket

Error: hello.c:7:2:
error: expected declaration or statement at end of input

return 0;

4. Bug: Remove slash

Error :
/usr/lib/gcc/x86_64-redhat-linux/7/../../../../lib64/crt1.o: In
function `_start':

(.text+0x20):
undefined reference to `main'

collect2: error: ld
returned 1 exit status

5. Bug : Remove 0
after returned

Error: hello.c:7:2:
warning: ‘return’ with no value, in function returning non-void

return ;

6. Bug : Remove f
after (printf)

Error: warning:
implicit declaration of function ‘print’; did you mean ‘printf’?
[-Wimplicit-function-declaration]

print("Hello
World\n");

7. Bug : Remove semi
colon after (;) return

Error: hello.c:7:2:
error: expected ‘;’ before ‘return’

return 0;

8. Bug : Spelling
Mistake(retun)

Error : hello.c:7:2:
error: ‘retun’ undeclared (first use in this function); did you
mean ‘rewind’?

Retun 0;

9. Bug : Remove
space between int and main

Error : hello.c:3:1:
warning: return type defaults to ‘int’ [-Wimplicit-int]

intmain()

10. Bug: Remove int

Error: warning:
return type defaults to ‘int’ [-Wimplicit-int]

main()

pushpendra100991

p { margin-bottom: 0.1in; line-height: 120%; }

11. Bug : Remove .
After stdio

Error: hello.c:1:9:
fatal error: stdio`h: No such file or directory

#include<stdio`h>

12: Bug : Add space
after print f

Error : hello.c:5:2:
error: unknown type name ‘print’; did you mean ‘int’?

print f("Hello
India\n");

13: Bug : using
forward slash /

Error: Hello
India/nHello World/n

14. Bug : Remove n
after hello world

Errror :
hello.c:5:9: warning: missing terminating " character

printf("Hello
World\");

15. Bug : Remove
main

Error: hello.c:3:6:
error: expected identifier or ‘(’ before ‘)’ token

int ()

16. Bug : Remove (“
”)

Error : error:
‘Hello’ undeclared (first use in this function); did you mean
‘ftello’?

printf(Hello
World\n);

17. Bug : Remove
Include

Error : error:
invalid preprocessing directive #<

# <stdio.h>

^

hello.c: In function
‘main’:

hello.c:5:2:
warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("Hello
World\n");

18: Bug: Remove
small Bracket after (Int Main)

Error: hello.c:4:1:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘{’ token

{

19: Bug : Remove
space between return and 0

Error : hello.c: In
function ‘main’:

hello.c:6:2: error:
‘return0’ undeclared (first use in this function)

return0;

^~~~~~~

hello.c:6:2: note:
each undeclared identifier is reported only once for each function it
appears in

[root@localhost
training]#

20. Bug : write
Statement (stdio .h)

Error: hello.c:1:9:
fatal error: stdio .h: No such file or directory

#include<stdio
.h>

^~~~~~~~~~

compilation
terminated.

21. Bug: Remove
Printf

Error : Program Not
Run

22. Bug: using
Printf

Error: hello.c:5:2:
warning: implicit declaration of function ‘Printf’; did you mean
‘printf’? [-Wimplicit-function-declaration]

Printf("Hello
World\n");

nagalakshmidc11

1.

Root cause:
Removed ; from the print statement.

Error:
/hello.c:5:2: error: expected ‘;’ before ‘return’

return 0;

2. Root
cause: Removed # symbol from #include <stdio.h> line.

Error: /hello.c:1:9:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘<’ token

include <stdio.h>

3. Root
cause: return ‘a’ without declaring a.

Error: hello.c:6:9: error: ‘a’ undeclared (first use in this
function)

return a;

4. Root cause: put
a break

.Error: /hello.c:5:2:
error: break statement not within loop or switch

break;

5. Root cause: \n is
out of “”

Error: /hello.c:4:22:
error: stray ‘\’ in program

printf("Hello
World"\n);

/hello.c:4:23: error: expected ‘)’ before ‘n’

printf("Hello
World"\n);

6. Root Cause: put
else without if

Error: /hello.c: In
function ‘main’:

./hello.c:5:2:
error: ‘else’ without a previous ‘if’

else

7. Rootcause: put
enum

Erro: hello.c:6:2:
error: expected ‘{’ before ‘return’

return 0;

8. Rootcause:
removed > from stdio.h

Error: hello.c:1:18:
error: missing terminating > character

#include <stdio.h

9. Root cause:
include <<stdio.h>>

Error: hello.c:1:10:
fatal error: <stdio.h: No such file or directory

#include
<<stdio.h>>

compilation
terminated.

10. Rootcause: scanf
=> no & operator while reading value of a from user

Error: Hello World

2

Segmentation fault
(core dumped)

11. Rootcause: 10 =
a;

Error: hello.c:6:5:
error: lvalue required as left operand of assignment

10 = a;

12. Root
cause: Break statement

Error: hello.c:5:2:
error: break statement not within loop or switch

break;

p { margin-bottom: 0.25cm; line-height: 120%; }

nagalakshmidc11

13 Root cause: case
statement

Error: /hello.c:5:5:
error: expected expression before ‘:’ token

case:

./hello.c:5:1:
error: case label not within a switch statement

case:

14. Root cause: 2.2
>>2

Error: hello.c: In
function ‘main’:

hello.c:5:6: error:
invalid operands to binary >> (have ‘double’ and ‘int’)

2.2 >> 1;

15. Root
cause: modulos on float

Error: hello.c:6:8:
error: invalid operands to binary % (have ‘float’ and ‘int’)

a = a % 10;

16. Root cause:
main(1..1)

hello.c:2:10:
error: too many decimal points in number

int main(1..1)

17. Root cause:
main(1,2,3)

Error: hello.c:2:10:
error: expected declaration specifiers or ‘...’ before numeric
constant

main(1,2,3)

hello.c:2:10:
error: expected declaration specifiers or ‘...’ before numeric
constant

int main(1,2,3,4)

18. Root cause:
printf(“hllo world\n”)()

hello.c:
In function ‘main’:

hello.c:4:2: error:
called object is not a function or function pointer

printf("Hello
World\n")();

19. Root cause:
main() ()

Error: hello.c:2:5:
error: ‘main’ declared as function returning a function

int main()()

20. Root
cause:printf()(“Hello world\n”);

Error: hello.c:4:2:
error: too few arguments to function ‘printf’

printf()("Hello
World\n");

In file included
from hello.c:1:0:

/usr/include/stdio.h:318:12:
note: declared here

extern int printf
(const char *__restrict __format, ...);

p { margin-bottom: 0.25cm; line-height: 120%; }

abhishekmirapur

1. If removed semicolon in printf statement.

Error

world.c: In function ‘main’:

world.c:5:2: error: expected ‘;’ before ‘return’

return 0;

2. If removed semicolon in return statement.

Error

world.c: In function ‘main’:

world.c:6:2: error: expected ‘;’ before ‘}’ token

}

3. If removed space in return function between return and zero.

Error

world.c: In function ‘main’:

world.c:5:2: error: ‘return0’ undeclared (first use in this function)

return0;

world.c:5:2: note: each undeclared identifier is reported only once for each function it appears in

4. if removed int before main function.

Error

world.c:2:2: warning: return type defaults to ‘int’ [-Wimplicit-int]

main()

5. If written header file without #.

Error

[root@abhi abhishek]# gcc world.c

world.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

include<stdio.h>

6. If removed quotation mark in printf statement.

Error

world.c: In function ‘main’:

world.c:4:9: error: ‘Hello’ undeclared (first use in this function); did you mean ‘ftello’?

printf(Hello World\n);

^~~~~

ftello

world.c:4:9: note: each undeclared identifier is reported only once for each function it appears in

world.c:4:15: error: expected ‘)’ before ‘World’

printf(Hello World\n);

^~~~~

world.c:4:20: error: stray ‘\’ in program

printf(Hello World\n);

7. If removed \n in printf statement.

Error

[root@abhi abhishek]# vim world.c

[root@abhi abhishek]#

8. If written any letter after quotation mark in printf statement.

Error

world.c: In function ‘main’:

world.c:4:24: error: expected ‘)’ before ‘a’

printf("Hello World\n"a);

abhishekmirapur

@page { margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 120% }

9. If given
quotation mark before opening bracket and after closing bracket in
printf statement.

Error

world.c: In function
‘main’:

world.c:4:8: error:
expected ‘;’ before string constant

printf"(Hello
World\n)";

^~~~~~~~~~~~~~~~~

10. If remove main
function in program.

Error

world.c:3:1:
error: expected identifier or ‘(’ before ‘{’ token

{
^

11. If we write a
program without header file.

Error

world.c: In
function ‘main’:

world.c:4:2:
warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("Hello
World\n");

^~~~~~

world.c:4:2:
warning: incompatible implicit declaration of built-in function
‘printf’

world.c:4:2: note:
include ‘<stdio.h>’ or provide a declaration of ‘printf’

12. If remove blank
space between int and main.

Error

world.c:2:1:
warning: return type defaults to ‘int’ [-Wimplicit-int]

intmain()

^~~~~~~

/usr/lib/gcc/x86_64-redhat-linux/7/../../../../lib64/crt1.o:
In function `_start':

(.text+0x20):
undefined reference to `main'

collect2: error: ld
returned 1 exit status

13. If remove ‘{‘’
and ‘’}’’ in program.

Error

world.c: In
function ‘main’:

world.c:4:2: error:
expected declaration specifiers before ‘printf’

printf("Hello
World\n");

^~~~~~

world.c:5:2: error:
expected declaration specifiers before ‘return’

return 0;}

^~~~~~

world.c:5:11: error:
expected declaration specifiers before ‘}’ token

return 0;}

^

world.c:5:11: error:
expected ‘{’ at end of input.

14. If remove “<”
and ”>” sign in header file.

Error

world.c:1:2:
error: invalid preprocessing directive #includestdio; did you mean
#include?

#includestdio.h

^~~~~~~~~~~~

include

world.c: In function
‘main’:

world.c:4:2:
warning: implicit declaration of function ‘printf’
[-Wimplicit-function-declaration]

printf("Hello
World\n");

^~~~~~

world.c:4:2:
warning: incompatible implicit declaration of built-in function
‘printf’

world.c:4:2: note:
include ‘<stdio.h>’ or provide a declaration of ‘printf’

15. If remove
bracket in main function.

Error

[root@abhi
abhishek]# gcc world.c

world.c:3:1: error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘{’ token

{

16. If spelling
mistake in printf Function.

Error

world.c: In
function ‘main’:

world.c:4:2:
warning: implicit declaration of function ‘pintf’; did you mean
‘printf’? [-Wimplicit-function-declaration]

pintf("Hello
World\n");

^~~~~

printf

/tmp/ccC5d7mz.o: In
function `main':

world.c:(.text+0xf):
undefined reference to `pintf'

collect2: error: ld
returned 1 exit status

abhishekmirapur

@page { margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 120% }

17. If give opening
bracket “{“ before main function.

Error

world.c: In
function ‘main’:

world.c:4:2:
warning: implicit declaration of function ‘pintf’; did you mean
‘printf’? [-Wimplicit-function-declaration]

pintf("Hello
World\n");

^~~~~

printf

/tmp/ccC5d7mz.o: In
function `main':

world.c:(.text+0xf):
undefined reference to `pintf'

collect2: error: ld
returned 1 exit status

[root@abhi
abhishek]# vim world.c

[root@abhi
abhishek]# gcc world.c

world.c:2:1: error:
expected identifier or ‘(’ before ‘{’ token

{

18. If use sigle
quote at place of quotation mark.

Error

[root@abhi
abhishek]# gcc world.c

world.c: In function
‘main’:

world.c:4:9:
warning: character constant too long for its type

printf('Hello
World\n');

^~~~~~~~~~~~~~~

world.c:4:9:
warning: passing argument 1 of ‘printf’ makes pointer from
integer without a cast [-Wint-conversion]

In file included
from world.c:1:0:

/usr/include/stdio.h:318:12:
note: expected ‘const char * restrict’ but argument is of type
‘int’

extern int printf
(const char *__restrict __format, ...);

19. If given double
bracket before semicolon in printf statement.

Error

world.c: In
function ‘main’:

world.c:4:25: error:
expected ‘;’ before ‘)’ token

printf("Hello
World\n"));

^

world.c:4:25: error:
expected statement before ‘)’ token

20. If removed .h
in header file.

Error

world.c:1:9:
fatal error: stdio: No such file or directory

#include<stdio>

^~~~~~~

rambabu843421

@page { margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 120% }

Error 1. Removing
“ # ”

hello.c:1:10: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘<’ token

Error 2. removing
space b/w int and main

/usr/lib/gcc/i686-redhat-linux/4.6.0/../../../crt1.o: In function
`_start':

(.text+0x18): undefined reference to `main'

Error 3. removing
double cott from printf bracket

hello.c:
In function ‘main’:

hello.c:6:9: error: ‘hello’ undeclared (first use in this
function)

hello.c:6:9: note: each undeclared identifier is reported only once
for each function it appears in

hello.c:6:15: error: expected ‘)’ before ‘world’

hello.c:6:15: error: stray ‘\’ in program

hello.c:6:22: warning: missing terminating " character [enabled
by default]

hello.c:6:15: error: missing terminating " character

.c:10:1:
error: expected ‘;’ before ‘}’ token

Error 4. write
printf function start with capital “ P “

/tmp/cc3ViKbm.o: In function `main':

hello.c:(.text+0x11): undefined reference to `Printf'

Error 5. give space
b/w “ printf ”

hello.c:
In function ‘main’:

hello.c:6:1: error: unknown type name ‘print’

hello.c:6:9: error: expected declaration specifiers or ‘...’
before string constant

Error 6. remove
close curly braces “ } ”

hello.c:
In function ‘main’:

hello.c:8:1: error: expected declaration or statement at end of input

Error 7. removing
semicolon from return statement

hello.c:
In function ‘main’:

hello.c:10:1: error: expected ‘;’ before ‘}’ token

Error 8. replace
semicolon with colon in printf statement

hello.c:
In function ‘main’:

hello.c:6:25: error: expected ‘;’ before ‘:’ token

Error 9. removing
dot “ . ” from header file stdio.h

hello.c:1:20: fatal error: stdioh: No such file or directory

compilation terminated.

rambabu843421

@page { margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 120% }

Error 10. removing
headerfile

hello.c:
In function ‘main’:

hello.c:6:1: warning: incompatible implicit declaration of built-in
function ‘printf’ [enabled by default]

Error 11. write
headerfile first latter in uppre case

hello.c:1:3: error: invalid preprocessing directive #Include

hello.c: In
function ‘main’:

hello.c:6:1: warning: incompatible implicit declaration of built-in
function ‘printf’ [enabled by default]

Error 12. replace
semicolon with “ , ” in return statement

hello.c:
In function ‘main’:

hello.c:10:1: error: expected expression before ‘}’ token

Error 13. write a
character after semicolon in printf statement

hello.c: In function ‘main’:

hello.c:6:27: error: ‘f’ undeclared (first use in this function)

hello.c:6:27: note: each undeclared identifier is reported only once
for each function it appears in

hello.c:8:1: error: expected ‘;’ before ‘return’

Error 14. write any
character after close doublecott

hello.c: In function ‘main’:

hello.c:6:24: error: expected ‘)’ before ‘i’

Error 15. write
semicolon after main funtion

hello.c:4:1: error: expected identifier or ‘(’ before ‘{’
token

{

Error 16. write
bracket after return statement return ();

hello.c:4:1: error: expected identifier or ‘(’ before ‘{’
token

{

Error 17. write
return and return value withtogather

hello.c:
In function ‘main’:

hello.c:8:1: error: ‘return0’ undeclared (first use in this
function)

return0;

^~~~~~~

hello.c:8:1: note: each undeclared identifier is reported only once
for each function it appears in

rambabu843421

@page { margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 120% }

Error 18. write
comma after close doublecott

hello.c: In
function ‘main’:

hello.c:8:1: error: ‘return0’ undeclared (first use in this
function)

return0;

^~~~~~~

hello.c:8:1: note: each undeclared identifier is reported only once
for each function it appears in

[

Error 19. write
semicolon before close bracket

hello.c: In
function ‘main’:

hello.c:6:24: error: expected ‘)’ before ‘;’ token

printf("
hello world/n";);

Error 20. remove
open curly braces

hello.c: In
function ‘main’:

hello.c:4:1: error: expected declaration specifiers before ‘printf’

printf("
hello world/n";);

^~~~~~

hello.c:4:25: error: expected declaration specifiers before ‘)’
token

printf("
hello world/n";);

^

hello.c:6:1: error: expected declaration specifiers before ‘return’

return 0;

^~~~~~

hello.c:8:1: error: expected declaration specifiers before ‘}’
token

}

^

hello.c:8:1: error: expected ‘{’ at end of input

harshitsingh0707

p { margin-bottom: 0.1in; line-height: 120%; }

ERROR

1) removed ; in
printf

hello.c:6:2: error:
expected ‘;’ before ‘return’

return(0);

2)removed ) before ;

hello.c:5:22: error:
expected ‘)’ before ‘;’ token

printf("hello
world";

^

hello.c:7:1: error:
expected ‘;’ before ‘}’ token

3)remove (“ “)
in printf

hello.c:5:9: note:
each undeclared identifier is reported only once for each function it
appears in

hello.c:5:15: error:
expected ‘)’ before ‘world’

printf(hello
world);

4)

removing ; in from
return0

hello.c:8:1: error:
expected ‘;’ before ‘}’ token

}

5) removing int from
main

hello.c:3:2:
warning: return type defaults to ‘int’ [-Wimplicit-int]

main()

6)removing hash from
library

hello.c:1:8: error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘<’ token

include<stdio.h>

7)removing header
file

hello.c:4:2:
warning: incompatible implicit declaration of built-in function
‘printf’

hello.c:4:2: note:
include ‘<stdio.h>’ or provide a declaration of ‘printf’

8)removing
parathesis of main function

hello.c:4:2:
warning: incompatible implicit declaration of built-in function
‘printf’

hello.c:4:2: note:
include ‘<stdio.h>’ or provide a declaration of ‘printf’

9) removing closing
bracket of main finction

hello.c:5:10: error:
expected declaration or statement at end of input

return(0);

10) spelling
mistake of printf

ello.c:4:2: warning:
implicit declaration of function ‘print’; did you mean ‘printf’?
[-Wimplicit-function-declaration]

print(" hello
world" );

^~~~~

printf

/tmp/ccmy4vPk.o: In
function `main':

hello.c:(.text+0xf):
undefined reference to `print'

collect2: error: ld
returned 1 exit status

harshitsingh0707

p { margin-bottom: 0.1in; line-height: 120%; }

11) removing bracket
of stdio.h

hello.c:4:2:
warning: incompatible implicit declaration of built-in function
‘printf’

hello.c:4:2: note:
include ‘<stdio.h>’ or provide a declaration of ‘printf

12) replacing int
with void

hello.c:5:16:
warning: ‘return’ with a value, in function returning void

return(0);

^

hello.c:2:7: note:
declared here

void main()

13) removing bracket
of printf

hello.c: In function
‘main’:

hello.c:4:8: error:
expected ‘;’ before string constant

printf" hello
world";

14) removing zero(0)
from return

hello.c:5:16: error:
expected expression before ‘)’ token

return();

15) removing (.h)
from stdio

hello.c:1:9: fatal
error: stdio: No such file or directory

#include<stdio>

^~~~~~~

compilation
terminated.

16) missing single
bracket of main

hello.c:3:1:
error: expected declaration specifiers or ‘...’ before ‘{’
token

17) used colon
instead of semicolon

hello.c:5:18: error: expected ‘;’ before ‘:’ token

return(0):

18) remove printf
command

hello.c: In
function ‘main’:

hello.c:4:4:
error: unknown type name ‘hello’

hello world/n ;

^~~~~

hello.c:4:15:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘/’ token

hello world/n ;

19) extra characrer
after commas of printf

hello.c:4:26:
error: expected ‘)’ before ‘hi’

print( "
hello world/n "hi ) ;

20) backspace error
in main() function

hello.c:2:1:
warning: return type defaults to ‘int’ [-Wimplicit-int]

intmain()

^~~~~~~

/usr/lib/gcc/x86_64-redhat-linux/7/../../../../lib64/crt1.o:
In function `_start':

(.text+0x20):
undefined reference to `main'

vikassinghweb7

@page { size: 21cm 29.7cm; margin: 2cm }
p { margin-bottom: 0.25cm; line-height: 115%; background: transparent }

ERROR IN HELLO WORLD

1.Removing hash(#) before include

hello.c:1:8: error:
expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’
before ‘<’ token

1 |
include<stdio.h>

| ^

2.removed dot(.)
from stdio.h

hello.c:1:9: fatal
error: stdioh: No such file or directory

1 |
#include<stdioh>

|
^~~~~~~~

compilation
terminated.

3.removing
semicolon

hello.c: In function
‘main’:

hello.c:4:26: error:
expected ‘;’ before ‘return’

4 | printf
("hello world\n")

|
^

|
;

5 | return 0;

| ~~~~~~

4.removing p from
printf

hello.c: In function
‘main’:

hello.c:4:2:
warning: implicit declaration of function ‘rintf’
[-Wimplicit-function-declaration]

4 | rintf
("hello world\n");

| ^~~~~

hello.c:4:2:
warning: incompatible implicit declaration of built-in function
‘rintf’

hello.c:2:1: note:
include ‘<math.h>’ or provide a declaration of ‘rintf’

1 |
#include<stdio.h>

+++ |+#include
<math.h>

2 | int main()

hello.c:4:9: error:
incompatible type for argument 1 of ‘rintf’

4 | rintf
("hello world\n");

|
^~~~~~~~~~~~~~~

| |

| char
*

hello.c:4:9: note:
expected ‘float’ but argument is of type ‘char *’

5.removing
terminator in stdio.h

hello.c:1:17: error:
missing terminating > character

1 |
#include<stdio.h

|
^

vikassinghweb7

6. removed #include

hello.c:1:1: error: expected identifier or ‘(’ before ‘<’ token

1 | <stdio.h>

| ^

7. removed } after return

hello.c: In function ‘main’:

hello.c:5:2: error: expected declaration or statement at end of input

5 | return 0 ;

| ^~~~~~

8. removed brackets () from hello world

hello.c: In function ‘main’:

hello.c:4:8: error: expected ‘;’ before string constant

4 | printf "hello world\n" ;

| ^~~~~~~~~~~~~~~~

| ;

vikassinghweb7

9.removed ” from hello world

hello.c: In function ‘main’:

hello.c:4:10: warning: missing terminating " character

4 | printf ("hello world\n) ;

| ^

hello.c:4:10: error: missing terminating " character

4 | printf ("hello world\n) ;

| ^~~~~~~~~~~~~~~~~

hello.c:5:2: error: expected expression before ‘return’

5 | return 0 ;

| ^~~~~~

hello.c:5:12: error: expected ‘;’ before ‘}’ token

5 | return 0 ;

| ^

| ;

6 | }

| ~

vikassinghweb7

10. removed space between return 0

hello.c: In function ‘main’:

hello.c:5:2: error: ‘return0’ undeclared (first use in this function)

5 | return0;

| ^~~~~~~

hello.c:5:2: note: each undeclared identifier is reported only once for each function it appears in

vikassinghweb7

11. uppercase P in printf

hello.c: In function ‘main’:

hello.c:4:2: warning: implicit declaration of function ‘Printf’; did you mean ‘printf’? [-Wimplicit-function-declaration]

4 | Printf ("hello world\n") ;

| ^~~~~~

| printf

/usr/bin/ld: /tmp/ccvRCIGF.o: in function `main':

hello.c:(.text+0xf): undefined reference to `Printf'

collect2: error: ld returned 1 exit status

12. removing<stdio.h>

ello.c:1:9: error: #include expects "FILENAME" or <FILENAME>

1 | #include

| ^

hello.c: In function ‘main’:

hello.c:4:2: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]

4 | printf ("hello world\n") ;

| ^~~~~~

hello.c:4:2: warning: incompatible implicit declaration of built-in function ‘printf’

hello.c:1:1: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’

+++ |+#include <stdio.h>

1 | #include

vikassinghweb7

13. removed { before printf

hello.c: In function ‘main’:

hello.c:3:1: error: expected declaration specifiers before ‘printf’

3 | printf("helloworld\n");

| ^~~~~~

hello.c:4:2: error: expected declaration specifiers before ‘return’

4 | return 0;

| ^~~~~~

hello.c:5:1: error: expected declaration specifiers before ‘}’ token

5 | }

| ^

hello.c:6: error: expected ‘{’ at end of input

6 |

|

vikassinghweb7

14.removing < before stdio.h

hello.c:1:2: error: invalid preprocessing directive #includestdio

1 | #includestdio.h>

| ^~~~~~~~~~~~

hello.c: In function ‘main’:

hello.c:4:2: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]

4 | printf("helloworld\n");

| ^~~~~~

hello.c:4:2: warning: incompatible implicit declaration of built-in function ‘printf’

hello.c:1:1: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’

+++ |+#include <stdio.h>

1 | #includestdio.h>

vikassinghweb7

15.removing “ before helloworld

hello.c: In function ‘main’:

hello.c:4:19: error: stray ‘\’ in program

4 | printf(helloworld\n");

| ^

hello.c:4:9: error: ‘helloworld’ undeclared (first use in this function)

4 | printf(helloworld\n");

| ^~~~~~~~~~

hello.c:4:9: note: each undeclared identifier is reported only once for each function it appears in

hello.c:4:19: error: expected ‘)’ before ‘n’

4 | printf(helloworld\n");

| ^~

| )

hello.c:4:21: warning: missing terminating " character

4 | printf(helloworld\n");

| ^

hello.c:4:21: error: missing terminating " character

4 | printf(helloworld\n");

| ^~~

hello.c:5:12: error: expected ‘;’ before ‘}’ token

5 | return 0;

| ^

| ;

6 | }

| ~

vikassinghweb7

16. remove space between int & main

hello.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]

2 | intmain()

| ^~~~~~~

/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/9/../../../../lib64/crt1.o: in function `_start':

(.text+0x24): undefined reference to `main'

collect2: error: ld returned 1 exit status

17.REMOVED ( FROM main()

hello.c:2:9: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘)’ token

2 | int main)

| ^

vikassinghweb7

18.removed main()

hello.c:3:1: error: expected identifier or ‘(’ before ‘{’ token

3 | {

| ^

19.removed ) from main()

hello.c:3:1: error: expected declaration specifiers or ‘...’ before ‘{’ token

3 | {

| ^

vikassinghweb7

20. removed stdio.h

hello.c:1:9: error: empty filename in #include

1 | #include<>

| ^~

hello.c: In function ‘main’:

hello.c:4:2: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]

4 | printf("helloworld\n");

| ^~~~~~

hello.c:4:2: warning: incompatible implicit declaration of built-in function ‘printf’

hello.c:1:1: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’

+++ |+#include <stdio.h>

1 | #include<>

21.removed main

hello.c:2:6: error: expected identifier or ‘(’ before ‘)’ token

2 | int ()

| ^

errors in helloworld

mohitvaishnav962

@page { margin: 0.79in }
p { margin-bottom: 0.1in; line-height: 120% }

1. hello.c: In
function ‘main’:

hello.c:6:1:
error: expected ‘;’ before ‘return’

return 0;

2. hello.c:7:1:
error: expected ‘;’ before ‘}’ token

}

^

3. hello.c:4:16:
error: missing terminating " character

printf("Hello);

^~~~~~~~

hello.c:6:1:
error: expected expression before ‘return’

return 0;

^~~~~~

hello.c:7:1:
error: expected ‘;’ before ‘}’ token

}

^

4. hello.c:3:1:
error: expected identifier or ‘(’ before ‘{’ token

{

^

5. hello.c:3:1:
error: expected identifier or ‘(’ before ‘{’ token

{

^

6. hello.c:1:9:
fatal error: stdioh: No such file or directory

#include<stdioh>

^~~~~~~~

compilation
terminated.

7. hello.c:6:1:
error: expected ‘)’ before ‘return’

return 0;

^~~~~~

hello.c:7:1:
error: expected ‘;’ before ‘}’ token

}

^

8. hello.c:6:1:
error: expected declaration or statement at end of input

return 0;

^~~~~~

9. hello.c:2:11:
error: expected declaration specifiers or ‘...’ before ‘]’
token

void main(]

^

hello.c:2:11:
error: expected ‘;’, ‘,’ or ‘)’ before ‘]’ token

10. hello.c:2:10:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or
‘__attribute__’ before ‘{’ token

void main{}

^

hello.c:3:1:
error: expected identifier or ‘(’ before ‘{’ token

{

^

mohitvaishnav962

11. gcc: error: helo.c: No such file or directory

gcc: fatal error: no input files

compilation terminated.

12. hello.c:2:1: warning: data definition has no type or storage class

voidmain();

^~~~~~~~

hello.c:2:1: warning: type defaults to ‘int’ in declaration of ‘voidmain’ [-Wimplicit-int]

hello.c:3:1: error: expected identifier or ‘(’ before ‘{’ token

{

^

13. hello.c: In function ‘main’:

hello.c:6:1: error: ‘return0’ undeclared (first use in this function)

return0;

^~~~~~~

hello.c:6:1: note: each undeclared identifier is reported only once for each function it appears in

14. hello.c: In function ‘main’:

hello.c:6:8: warning: ‘return’ with a value, in function returning void

return 0

^

hello.c:2:6: note: declared here

void main()

^~~~

hello.c:8:1: error: expected ‘;’ before ‘}’ token

}

^

15. hello.c: In function ‘main’:

hello.c:6:1: error: expected identifier before ‘return’

return 0;

^~~~~~

16. hello.c: In function ‘main’:

hello.c:6:1: error: expected expression before ‘return’

return 0;

^~~~~~

17. hello.c: In function ‘main’:

hello.c:6:1: error: expected expression before ‘return’

return 0;

^~~~~~

18. hello.c: In function ‘main’:

hello.c:4:25: error: expected expression before ‘/’ token

printf("Hello");/

^

19. hello.c: In function ‘main’:

hello.c:4:25: error: expected expression before ‘:’ token

printf("Hello");:

^

20. hello.c: In function ‘main’:

hello.c:6:1: error: expected expression before ‘return’

return 0;

^~~~~~

adarshkr55

1. if we remove #

programing.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

include<stdio.h>

^

2. if we use void maim

programing.c: In function ‘main’:

programing.c:7:8: warning: ‘return’ with a value, in function returning void

return 0;

^

programing.c:3:6: note: declared here

void main()

^~~~

3. if we remove (.) before h

programing.c:1:10: fatal error: stdioh: No such file or directory

#include <stdioh>

^~~~~~~~

4. when we remove small bracket after main

programing.c:4:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token

{

^

5. when we not use {

programing.c:11:1: error: expected ‘{’ at end of input

6. if we do not use the statement terminator ;

programing.c:7:1: error: expected ‘;’ before ‘return’

return 0;

^~~~~~

7.id we do not write print instead of printf

programing.c: In function ‘main’:

programing.c:5:2: warning: implicit declaration of function ‘print’; did you mean ‘printf’? [-Wimplicit-function-declaration]

print("hello world \n");

^~~~~

printf

programing.c:7:8: warning: ‘return’ with a value, in function returning void

return 0;

^

programing.c:3:6: note: declared here

void main()

^~~~

/tmp/cceY8LDk.o: In function `main':

programing.c:(.text+0xf): undefined reference to `print'

collect2: error: ld returned 1 exit status

8. if we use statement terminator after main function

programing.c:4:1: error: expected identifier or ‘(’ before ‘{’ token

{

^

9.if we use double ## before include

programing.c:1:11: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

##include <stdio.h>

^

10. if we use double .. between stdio & h

programing.c:1:10: fatal error: stdio..h: No such file or directory

#include <stdio..h>

^~~~~~~~~~

adarshkr55

11.if we do not use ( “ ) before hello world

programing.c:11:1: error: expected ‘;’ before ‘}’ token

}

^

12. if mistake the spelling of stdio.h then

programing.c:1:10: fatal error: stdo.h: No such file or directory

#include <stdo.h>

^~~~~~~~

13. when we use .l instead of .h

programing.c:1:10: fatal error: stdo.l: No such file or directory

#include <stdo.l>

^~~~~~~~

compilation terminated.

14.if we use () instead of <> then,

programing.c:1:10: error: #include expects "FILENAME" or <FILENAME>

#include (stdo.h)

^

programing.c: In function ‘main’:

programing.c:5:2: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]

printf("hello world \n");

^~~~~~

programing.c:5:2: warning: incompatible implicit declaration of built-in function ‘printf’

programing.c:5:2: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’

programing.c:7:8: warning: ‘return’ with a value, in function returning void

return 0;

^

programing.c:3:6: note: declared here

void main()

^~~~

15.if we use statement terminator before curly bracket }

programing.c:1:10: fatal error: stdo.h: No such file or directory

#include <stdo.h>

^~~~~~~~

compilation terminator

16. if use statement terminator after <stdio.h>;

programing.c:1:19: warning: extra tokens at end of #include directive

#include <stdio.h>;

^

programing.c: In function ‘main’:

programing.c:7:8: warning: ‘return’ with a value, in function returning void

return 0;

^

programing.c:3:6: note: declared here

void main()

^~~~

adarshkr55

17. if we use equal to = before printf

programing.c: In function ‘main’:

programing.c:5:8: error: lvalue required as left operand of assignment

printf=("hello world \n");

^

programing.c:7:8: warning: ‘return’ with a value, in function returning void

return 0;

^

programing.c:3:6: note: declared here

void main()

^~~~

18.when we use {}curly bracket after main

programing.c:3:10: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token

void main{}

^

programing.c:4:1: error: expected identifier or ‘(’ before ‘{’ token

{

^

19.if we do not use main function

programing.c:4:1: error: expected identifier or ‘(’ before ‘{’ token

{

^

20.if we use double statement terminator

programing.c: In function ‘main’:

programing.c:7:8: warning: ‘return’ with a value, in function returning void

return 0;

^

programing.c:3:6: note: declared here

void main()

^~~~

21.printf("a is %d and b is %d "a,b);

add.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]

main()

^~~~

add.c: In function ‘main’:

add.c:5:30: error: expected ‘)’ before ‘a’

printf("a is %d \n b is %d" a,b);

^

22. printf("a is %d \n b is %d",a,b\n);

add.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]

main()

^~~~

add.c: In function ‘main’:

add.c:5:33: error: stray ‘\’ in program

printf("a is %d \n b is %d",a,b\n);

^

add.c:5:34: error: expected ‘)’ before ‘n’

printf("a is %d \n b is %d",a,b\n);

23 printf("hello world\n)";

error.c: In function ‘main’:

error.c:4:24: error: expected ‘)’ before ‘;’ token

printf("hello world\n)";

^

error.c:7:1: error: expected ‘;’ before ‘}’ token

}

^

sourabhsagar7601

; Printing Hello World from Assembly on screen

global _start

section .data ; declaring '.data' section

msg db 'Hello World! from x86 Assembly',0x0a ; declaring a '\n' terminated string

len equ $ - msg ; calculating length of msg string

section .text ; declaring '.text' section

_start:

mov eax, 4 ; sys_write system call

mov ebx, 1 ; stdout file descripter

mov ecx, msg ; bytes to write

mov edx, len ; num of bytes to write

int 0x80 ; perform system call

mov eax, 1 ; sys_exit system call

mov ebx, 10 ; exit status 10

sub ebx, 5

int 0x80

sourabhsagar7601

To start Assembly programming

1. install nasm

i.e. sudo apt install nasm

2. create a file with '.asm' extension

i.e. vim example.asm

3. compile it for 32 bit architecture

i.e. nasm -f elf32 example.asm -o example.o

4. link it with other executibles via linker

i.e. ld -m elf_i386 example.o -o a.out

5. finally execute it

i.e. ./a.out

6. use '$?' with echo to see exitStatus of last command

i.e. echo $?

spatlou

1: Removed > from #include line

hello.c:1:17: error: missing terminating > character

1 | #include<stdio.h

| ^

2: Removed # from include line

hello.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

1 | include<stdio.h>

| ^

jyotialn

helloworld.c:4:12: error: expected ‘;’ before string constant

4 | printf"hello world\n";

| ^~~~~~~~~~~~~~~

| ;.c:1:9: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

helloworld1 | include <stdio.h>

|

helloworld.c:1:10: error: #include expects "FILENAME" or <FILENAME>

1 | #include stdio.h>

| ^~~~~

helloworld.c:1:10: fatal error: stdio.h: No such file or directory

1 | #include < stdio.h>

| ^~~~~~~~~~

helloworld.c:4:2: error: expected declaration specifiers before ‘printf’

4 | printf("hello world\n");

| ^~~~~~

helloworld.c:5:2: error: expected declaration specifiers before ‘return’

5 | return 0;

| ^~~~~

jyotialn

helloworld.c:6:1: error: expected declaration specifiers before ‘}’ token

6 | }

helloworld.c:7: error: expected ‘{’ at end of input

helloworld.c:4:25: error: expected ‘;’ before ‘return’

4 | printf("hello world\n")

| ^

| ;

5 | return 0;

helloworld.c:5:2: error: expected declaration or statement at end of input

5 | return 0;

helloworld.c:4:18: error: expected ‘)’ before ‘world’

4 | printf(hello world\n");

| ^~~~~~

| )

helloworld.c:4:24: error: stray ‘\’ in program

4 | printf(hello world\n");

| ^

helloworld.c:4:26: warning: missing terminating " character

4 | printf(hello world\n");

jyotialn

helloworld.c:5:15: error: expected ‘;’ before ‘}’ token

5 | return 0;

| ^

|helloworld.c:4:29: error: expected ‘;’ before ‘return’

4 | printf("hello world\n")

| ^

| ;

5 | return 0 ;

helloworld.c:2:2: error: expected identifier or ‘(’ before ‘)’ token

2 | ()

| ^

helloworld.c:1:10: fatal error: stdio.h : No such file or directory

1 | #include < stdio.h >

| ^~~~~~~~~~~

helloworld.c:4:12: error: expected ‘;’ before string constant

4 | printf"hello world\n";

| ^~~~~~~~~~~~~~~

| ;

vickeyvk93

1. Remove # from include line.

hallo.c:1:8: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token

1 | include<stdio.h>

| ^

vickeyvk93

2.Remove <from include line.

hallo.c:1:2: error: invalid preprocessing directive #includestdio

1 | #includestdio.h>

| ^~~~~~~~~~~~

hallo.c: In function ‘main’:

hallo.c:5:2: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]

5 | printf("hallo marry\n");

| ^~~~~~

hallo.c:5:2: warning: incompatible implicit declaration of built-in function ‘printf’

hallo.c:1:1: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’

+++ |+#include <stdio.h>

1 | #includestdio.h>

vickeyvk93

3.Remove > from include line.

hallo.c:1:17: error: missing terminating > character

1 | #include<stdio.h

| ^

4.Remove . from stdio.h.

hallo.c:1:9: fatal error: stdioh: No such file or directory

1 | #include<stdioh>

| ^~~~~~~~

compilation terminated.

vickeyvk93

5.Remove ( from int main line.

hallo.c:3:9: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘)’ token

3 | int main)

| ^

6.Remove { before printf.

hallo.c: In function ‘main’:

hallo.c:5:2: error: expected declaration specifiers before ‘printf’

5 | printf("hallo marry\n");

| ^~~~~~

hallo.c:6:2: error: expected declaration specifiers before ‘return’

6 | return 0;

| ^~~~~~

hallo.c:7:1: error: expected declaration specifiers before ‘}’ token

7 | }

| ^

hallo.c:7: error: expected ‘{’ at end of input

7 | }

|

7. Remove ) after int main(.

hallo.c:4:1: error: expected declaration specifiers or ‘...’ before ‘{’ token

4 | {

| ^

vickeyvk93

8.Remove f from printf.

hallo.c: In function ‘main’:

hallo.c:5:2: warning: implicit declaration of function ‘print’; did you mean ‘printf’? [-Wimplicit-function-declaration]

5 | print("hallo marry\n");

| ^~~~~

| printf

/usr/bin/ld: /tmp/ccgI5SFv.o: in function `main':

hallo.c:(.text+0x15): undefined reference to `print'

collect2: error: ld returned 1 exit status

9.Remove ( before starting of hello word.

hallo.c: In function ‘main’:

hallo.c:5:8: error: expected ‘;’ before string constant

5 | printf"hallo marry\n");

| ^~~~~~~~~~~~~~~

| ;

hallo.c:5:23: error: expected statement before ‘)’ token

5 | printf"hallo marry\n");

| ^

vickeyvk93

10.Remove ) after marry\n"

hallo.c: In function ‘main’:

hallo.c:5:24: error: expected ‘)’ before ‘;’ token

5 | printf("hallo marry\n";

| ^

| )

hallo.c:6:11: error: expected ‘;’ before ‘}’ token

6 | return 0;

| ^

| ;

7 | }

| ~

11.Remove 0 after return

hallo.c: In function ‘main’:

hallo.c:6:2: warning: ‘return’ with no value, in function returning non-void

6 | return ;

| ^~~~~~

hallo.c:3:5: note: declared here

3 | int main()

| ^~~~

vickeyvk93

12.Remove ; after return 0

hallo.c: In function ‘main’:

hallo.c:6:10: error: expected ‘;’ before ‘}’ token

6 | return 0

| ^

| ;

7 | }

| ~

13.Remove last }

hallo.c: In function ‘main’:

hallo.c:6:2: error: expected declaration or statement at end of input

6 | return 0;

| ^~~~~~

13.Remove int

hallo.c:3:2: warning: return type defaults to ‘int’ [-Wimplicit-int]

3 | main()

| ^~~~

vickeyvk93

15.Remove #include <stdio.h> line,

hallo.c:1:2: error: invalid preprocessing directive #<

1 | #<stdio.h>

| ^

hallo.c: In function ‘main’:

hallo.c:5:2: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]

5 | printf("hallo marry\n");

vickeyvk93

16.Remove ”hallo marry\n” and find the error.

hallo.c: In function ‘main’:

hallo.c:5:9: error: ‘hallo’ undeclared (first use in this function)

5 | printf(hallo marry\n);

| ^~~~~

hallo.c:5:9: note: each undeclared identifier is reported only once for each function it appears in

hallo.c:5:14: error: expected ‘)’ before ‘marry’

5 | printf(hallo marry\n);

| ^~~~~~

| )

hallo.c:5:20: error: stray ‘\’ in program

5 | printf(hallo marry\n);

| ^

Hello World

1 Bug : Remove # from header file

; Printing Hello World from Assembly on screen

To start Assembly programming

1. install nasm

i.e. sudo apt install nasm

2. create a file with '.asm' extension

i.e. vim example.asm

3. compile it for 32 bit architecture

i.e. nasm -f elf32 example.asm -o example.o

4. link it with other executibles via linker

i.e. ld -m elf_i386 example.o -o a.out

5. finally execute it

i.e. ./a.out

6. use '$?' with echo to see exitStatus of last command

i.e. echo $?

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