递归函数

#include <iostream>
using namespace std;
void fun(int n)
{
cout << "start fun,n: " << n << endl;
if(n == 0)
return;
int temp = n - 1;
fun(temp);

cout << "end of fun,n: " << n << endl;
}

int main()
{
int a = 5;
fun(a);

cout<< "after fun(a), main end..." << endl;

return 0;
}