C++类中变量也可以是引用的代码实例

#include <iostream>using namespace std; class A {public:  int &x; int &y;  A(int &tmpX, int &tmpY):x(tmpX), y(tmpY){}};int main(){ int tmpX = 1; int tmpY = 2;  A a(tmpX, tmpY); a.x = 5; a.y = 6; cout << a.x << endl; // 5 cout << a.y << endl; // 6 return 0;}