Question

Here is my code.

#include<stdio.h>

int main(int argc,char** argv)
{
    FILE* fp;
    fp=fopen(argv[1],"r");

    struct element{
        int value;
        char activity;
    };

    typedef struct element element;
    element a;
    printf("%d",feof(fp));
}

Now if I don’t give the last printf command it does not give me a segmentation fault, but if I give it printf it gives me a seg fault. Why?

I got the answer to my prev problem, now i have another problem

i had .txt appended to my input file in my makefile. Now i have another problem. on command make it gives error.

0make: *** [a.out] Error 1 

why?

Answer 1

Check the return value of fopen (well, check the return value of any call), it probably failed to open the file.