Question

How to print a user error message to stderr in C

Answer 1

#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    FILE *fp;

    if ((fp = fopen("d:\\notexistingfile.txt", "r")) == NULL) 
    {
        perror("fopen: Could not open file for reading");
        return EXIT_FAILURE;
    }
    
    return EXIT_SUCCESS;
}

   
/*
run:
 
fopen: Could not open file for reading: No such file or directory

*/

 

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