Mid I-2: Points

#include <iostream>
using namespace std;

class Point{
private:
    int x, y;
public:
    Point():x(0), y(0){}
    ~Point(){}

    int getX() {return x;}
    int getY() {return y;}
    void setData(int a, int b) {x = a, y = b;}

    void readPoint(){
        cin >> x >> y;
    }

    void showPoint(){
        cout << "x = " << x << "  " << "y = " << y << endl;
    }
};

Point addPoint(Point A, Point B){
    Point temp;
    temp.setData(A.getX() + B.getX(), A.getY() + B.getY());
    return temp;
}

Point subPoint(Point A, Point B){
    Point temp;
    temp.setData(A.getX() - B.getX(), A.getY() - B.getY());
    return temp;
}

int main(){
    Point P[4];

    for(int i = 0; i < 2; i++)
        P[i].readPoint();

    P[2] = addPoint(P[0], P[1]);
    P[3] = subPoint(P[0], P[1]);

    for(int i = 2; i < 4; i++)
        P[i].showPoint();

    return 0;
}