atexit

Registers a function that is called without arguments at program termination.

Format

#include  <stdlib.h>

int atexit  (void (*func) (void));

Argument

func

A pointer to the function to be registered.

Return Values

0	Indicates that the registration has succeeded.
nonzero	Indicates failure.

Restriction

Example

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

static void hw(void);

main()
{
    atexit(hw);
}

static void hw()
{
        puts("Hello, world\n");
}

Running this example produces the following output:

Hello, world