error

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'