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# EXIT_SUCCESS, EXIT_FAILURE

From cppreference.com
< c‎ | program

Defined in header `<stdlib.h>` |  |
#define EXIT_SUCCESS /*implementation defined*/ |  |
#define EXIT_FAILURE /*implementation defined*/ |  |

The `EXIT_SUCCESS` and `EXIT_FAILURE` macros expand into integral expressions that can be used as arguments to the exit function (and, therefore, as the values to return from the main function), and indicate program execution status.

Constant | Explanation
`EXIT_SUCCESS` | successful execution of a program
`EXIT_FAILURE` | unsuccessful execution of a program

### [edit] Example

Run this code

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

    int main(void)
    {
        FILE *fp = fopen("data.txt","r");
        if (fp == NULL)
        {
           fprintf(stderr,"fopen() failed in file %s at line # %d", __FILE__,__LINE__);
           exit(EXIT_FAILURE);
        }

        /* Normal processing continues here. */
        fclose(fp);
        printf("Normal Return\n");

        return EXIT_SUCCESS;
    }

Output:

    fopen() failed in file main.cpp at line # 9

### [edit] See also

C++ documentation for EXIT_SUCCESS, EXIT_FAILURE

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