结构体一般都会定义相关的构造、重载函数,虽然很简单,但是有时候徒手又想不起来,所以记录一下。
#include <iostream>
using namespace std;
struct Point
{
int x;
int y;
Point(int X = 0, int Y = 0)
:x(X), y(Y)
{
}
friend ostream& operator << (ostream &Out, const Point &P)
{
Out << "x:" << P.x << " " << "y:" << P.y;
return Out;
}
friend istream& operator >> (istream &in, const Point &p)
{
// in >> p.x >> p.y;
return in;
}
//重载<,成员函数
bool operator < (const Point& P)const
{
return x < P.x;
}
//重载>友元函数
friend bool operator > (const Point &a,const Point &b)
{
return a.x > b.x ;
}
//重载+,调用构造函数
friend Point operator + (const Point& A,const Point& B)
{
return Point(A.x + B.x, A.y + B.y);
}
};
使用方法:
//初始化
Point A(0, 1),b(2, 3);
cout << A<<b << endl;
cout << (A>b) << endl << (A<b) << endl;
cout << A+b << endl;
输出结果: