代码如下:
#include <iostream>
using std::cout;
using std::endl;
using std::cin;
void swap(int &n1,int &n2)
{
n1 = n1 + n2;
n2 = n1 - n2;
n1 = n1 - n2;
}
int main()
{
int n1,n2;
cout << "请分别输入n1,n2的值:";
cin >> n1 >> n2;
swap(n1,n2);
cout << "交换后的两数分别为:n1 = " << n1 << " , n2 = " << n2 << endl;
return 0;
}
运行结果:
PS D:\LeetCode> cd "d:\LeetCode\" ; if ($?) { g++ Q22.cpp -o Q22 } ; if ($?) { .\Q22 }
请分别输入n1,n2的值:1 2
交换后的两数分别为:n1 = 2 , n2 = 1