undefined reference error

gaurav133232

Hi everyone, Iam having an error while executing this code:-

The error is:-

/usr/bin/ld: /usr/lib/gcc/x86_64-redhat-linux/11/../../../../lib64/crt1.o: in function `_start':
(.text+0x24): undefined reference to `main'
collect2: error: ld returned 1 exit status

Here is the code of both the files:-

main.c:-

#include"headers.h"
#include"declarations.h"
int main(){
int a;
a = factorial();
printf("factorial is %d\n",a);
return 0;
}

factorial.c:-

#include"headers.h"
#include"declarations.h"
int factorial(){
int n;
printf("enter a number\n");
scanf("%d",&n);
int fact = 1;
for(int i=0;i<n;i++){
fact*=i;
}
printf("factorial is %d\n",fact);
return fact;
}

nirmalpg124

inside declaratons.h

declare

int factorial();

then this declaration would be included in main.c and factorial.c as well.

now run main.c in terminal as

$ ./ gcc -c main.c

undefined reference error

Howdy, Stranger!

Categories