#include<iostream>
using namespace std;
void fun(int&a, int&b)
{
int c = 0;
c = a;
a = b;
b = c;
}
int main()
{
int x = 10;
int y = 20;
cout << x << "," << y << endl;
fun(x, y);
cout << x << "," << y << endl;
system("pause");
return 0;
}
这样不是更简单了
