Question

How to use exit status (EXIT_SUCCESS and EXIT_FAILURE) in C

Answer 1

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

int main()
{
    FILE * fp;
 
    // 2 - No such file or directory 
    fp = fopen("d:\\data-----txt", "r");

    if (fp == NULL)
    {
        printf("errno: %d\n", errno);
        printf("error message: %s\n", strerror(errno));
 
        exit(EXIT_FAILURE);
        printf("last line if\n");
    }
 
    else
    {
        fclose (fp);
        exit(EXIT_SUCCESS);
        printf("last line if\n");
    }
 
    return 0;
}

/*
run:
  
errno: 2
error message: No such file or directory
 
*/

 

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