用C++设计一个点类Point，实现点对象之间的+和-运算。 #include<iostream> using namespace std; 提供补充代码 int main() { Point p1,p2,psum,psub; int x,y; cin>>x>>y; p1.setP(x,y); cin>>x>>y; p2.setP(x,y); psum=p1+p2; psub=p1-p2; cout<<"两点相加："; psum.show(); cout<<"两点相减："; psub.show(); } 【输入形式】 两个点坐标 【输出形式】 两个点相加及相减的结果

下面是点类Point的实现代码：

#include<iostream>
using namespace std;

class Point {
private:
    int x;
    int y;
public:
    Point() {}
    Point(int x, int y) {
        this->x = x;
        this->y = y;
    }
    void setP(int x, int y) {
        this->x = x;
        this->y = y;
    }
    void show() {
        cout << "(" << x << "," << y << ")" << endl;
    }
    Point operator+(const Point& p) const {
        Point res;
        res.x = this->x + p.x;
        res.y = this->y + p.y;
        return res;
    }
    Point operator-(const Point& p) const {
        Point res;
        res.x = this->x - p.x;
        res.y = this->y - p.y;
        return res;
    }
};

int main() {
    Point p1, p2, psum, psub;
    int x, y;
    cin >> x >> y;
    p1.setP(x, y);
    cin >> x >> y;
    p2.setP(x, y);
    psum = p1 + p2;
    psub = p1 - p2;
    cout << "两点相加：";
    psum.show();
    cout << "两点相减：";
    psub.show();
    return 0;
}

输入格式为两个点的坐标，例如：

1 2
3 4

输出格式为相加和相减的结果，例如：

两点相加：(4,6)
两点相减：(-2,-2)