不申请额外内存空间就可以完成数据互换的算法:int x=a,y=b;设计一个算法，不申请第三个变量，试把a b互换位置

//不申请额外内存空间就可以完成数据互换的算法:int x=a,y=b;设计一个算法，不申请第三个变量，试把a b互换位置
#include <iostream>
using std::cin;
using std::cout;
using std::endl;
int main()
{
        int x,y;
        cout << "Enter two numbers: X Y" << endl;
        cin >> x >> y;
        cout << "X = " << x << endl << "Y = " << y << endl;
        x = x+y;
        y = x-y;
        x = x-y;
        cout << "Through the exchange:" << endl << "X = " << x << endl << "Y = " << y << endl;
        return 0;
}