#include<iostream> using namespace std; //引用访问私有数据成员 class Test { private: int x,y; public: void setxy(int a ,int b) { x = a; y = b; } void getxy(int &px,int &py) { px = x;//相当于 &px = a; px就是a了! py = y; } void printxy() { cout << x <<endl; cout << y <<endl; } }; int main() { Test p; p.setxy(3,5); int a,b; p.getxy(a,b); p.printxy(); return 0; }