面向对象程序设计上机练习四（变量引用）

Problem Description

Input

code

#include <iostream>
using namespace std;

void change(int c, int d)
{
cout << c << " " << d << endl;
int t;
t = c;
c = d;
d = t;
cout << c << " " << d << endl;
}

int main()
{
int a,b;
//变量引用
int &x = a;
int &y = b;
cin >> a >> b;
change(x,y);
return 0;
}