EXIT_SUCCESS, EXIT_FAILURE

 

C

Language

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Numerics

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Atomic operations (C11)

 

Program support utilities

Program termination
abort exit quick_exit (C++11) _Exit (C++11)	atexit at_quick_exit (C++11) EXIT_SUCCESSEXIT_FAILURE
Communicating with the environment
system	getenv
Signals
signal raise sig_atomic_t	SIG_DFLSIG_IGN SIG_ERR
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SIGABRTSIGFPESIGILLSIGINTSIGSEGVSIGTERM
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setjmp
longjmp
Types
jmp_buf

 

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

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

See also

C++ documentation for EXIT_SUCCESS, EXIT_FAILURE