#include <iostream> using namespace std; class Point { public: Point() { m_x = 0; m_y = 0; }; Point(int x, int y) : m_x(x), m_y(y) {}; ~Point() {}; friend ostream& operator<<(ostream& output, Point &p); friend istream& operator>>(istream& input, Point &p); private: int m_x; int m_y; }; ostream& operator<<(ostream& output, Point &p) { output << "x = " << p.m_x << ", " << "y = " << p.m_y; return output; } istream& operator>>(istream& input, Point &p) { input >> p.m_x >> p.m_y; return input; } int main() { Point p1(1, 2); Point p2; cin >> p2; cout << "point1: " << p1 << endl; cout << "point2: " << p2 << endl; return 0; }
输出结果:
3 4 point1: x = 1, y = 2 point2: x = 3, y = 4
来源:https://www.cnblogs.com/liutongqing/p/12422318.html