atexit注册终止处理程序

#include <cstdlib>#include <iostream>using namespace std;void fun1(){cout << "fun1" << endl;}void fun2(){cout << "fun2" << endl;}int main(int argc, char* argv[]){atexit(fun1);atexit(fun1);atexit(fun2);cout << "main" << endl;return 0;}

输出结果：
main
fun2
fun1
fun1