方法如下：
1 #include <stdio.h>
2
3 int atexit(void(*function)(void));
4 void fn1(void), fn2(void);
5
6 int main(int argc, char **argv) {
7 printf("Hello, World!\n");
8 atexit(fn1);
9 atexit(fn2);
10 return 0;
11
12 }
13
14 void fn1()
15 {
16 printf("come this\n");
17 }
18 void fn2()
19 {
20 printf("come this 2\n");
21 }
执行结果：
Hello, World!
come this 2
come this
标签：main,fn2,fn1,atexit,完后,void,int,printf,执行 From： https://www.cnblogs.com/xhu218/p/16885653.html