point.cpp

#include <iostream>
#include "point.h"
using namespace std;
int Point::n = 0;
// định nghĩa hàm của class
void Point::TT(int x)
{
    this->xVal += x;
    this->yVal += x;
}
void Point::Show()
{
    cout << this->xVal << " " << this->yVal << endl;
}
Point::Point() : xVal(0), yVal(0)
{
    this->xVal = 1;
    this->yVal = 2;
    Point::n++;
}
Point::Point(const Point &p) : xVal(p.xVal), yVal(p.yVal)
{
    // this->xVal = p.xVal;
    // this->yVal = p.yVal;
    Point::n++;
}
Point::Point(const int &x, const int &y) : xVal(x), yVal(y)
{
    //     this->xVal = x;
    //     this->yVal = y;
    Point::n++;
}
Point::~Point()
{
    Point::n--;
}

int main()
{
    Point p1;
    p1.Show();

    Point p2(3, 4);
    p2.Show();
    p2.TT(2);
    p2.Show();

    Point p3(p2);
    p3.TT(4);
    p3.Show();

    return 0;
}