/*-------------------------------------------------------------------*/
/* testatexit.c                                                      */
/* Demonstrate the atexit function.                                  */
/*-------------------------------------------------------------------*/

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

/*-------------------------------------------------------------------*/

/* Note that one often must use global variables to communicate
   with functions that are registered to be executed at process 
   exit. */

static int i = 0;

/*-------------------------------------------------------------------*/

static void printi(void)

/* Print the value of i. */

{
   printf("At the end of the process, the value of i is %d.\n", i);
}

/*-------------------------------------------------------------------*/

int main(void)

/* Demonstrate the atexit function. */

{
   /* Register function printi to be executed at process exit. */   
   atexit(printi);

   /* Do some computation. */
   i = 5;

   return 0;
}


/* Example execution:

$ gcc -Wall -ansi -pedantic -o testatexit testatexit.c
$ testatexit
At the end of the process, the value of i is 5.

*/