cpp(引用的本质)

Posted 2021-02-10 kenantongxue

/*
    引用作为变量的别名，在一些场合可以代替指针
*/

#include <iostream>
using namespace std;

void swap(int& a, int& b)
{
    int t = a;
    a = b;
    b = t;
}

int main()
{
    int a = 1;
    int b = 2;

    swap(a, b);

    cout << "a = " << a << endl
        << "b = " << b << endl;
}