/*********************************************************************************
 *      Copyright:  (C) 2025 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  atexit.c
 *    Description:  This file atexit() example program.
 *                 
 *        Version:  1.0.0(10/29/2025)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "10/29/2025 03:43:29 PM"
 *                 
 ********************************************************************************/

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

void f1(void) { printf("f1 called\n"); }
void f2(void) { printf("f2 called\n"); }
void f3(void) { printf("f3 called\n"); }

int main(void)
{
    atexit(f1);
    atexit(f2);
    atexit(f3);
    printf("main end\n");
    return 0;
}