题解 | 编写函数实现两数交换（引用方式）

#include <iostream>
using namespace std;

// write your code here......
void jiaohuan(int& m, int& n){
    int temp;
    temp = m;
    m = n;
    n = temp;
}

int main() {

    int m, n;
    cin >> m;
    cin >> n;

    // write your code here......
    jiaohuan(m, n);
    

    cout << m << " " << n << endl;

    return 0;
}