Cuby56

#include <iostream>
using namespace std;
 
class Point {
public:
    Point();
    Point(int x, int y);
    ~Point();
    Point(const Point& pt);
    Point& operator=(const Point& pt);
private:
    int x;
    int y;
};
 
// Constructor
Point::Point() {    
    this->x = 0;
    this->y = 0;
    cout << "Constructor : x = " << this->x << " y = " << this->y << "\n";
}
 
// Constructor
Point::Point(int x, int y) {    
    this->x = x;
    this->y = y;
    cout << "Constructor : x = " << this->x << " y = " << this->y << "\n";
}
 
// Destructor
Point::~Point() {   
    this->x = this->x - 1;
    this->y = this->y - 1;
    cout << "Distructor : x = " << this->x << " y = " << this->y << "\n";
}
 
// Copy Constructor
Point::Point(const Point& pt) {
    this->x = pt.x + 10;
    this->y = pt.y + 10;
    cout << "Copy Constructor : x = " << this->x << " y = " << this->y << "\n";
}
 
// Assignment Constructor
Point& Point::operator=(const Point& pt) {  
    this->x = pt.x + 20;
    this->y = pt.y + 20;
    cout << "Assignment Constructor : x = " << this->x << " y = " << this->y << "\n";
}
 
int main() {
 
    Point *pt1 = new Point(5, 6);   // calls constructor
    Point pt2( *pt1 );              // calls copy constructor
    Point pt3;
    pt3 = pt2;                      // calls assignment constructor
    delete pt1;                     // calls destructor
    
    cout << "main code end\n";
    return 0;
}

Constructor : x = 5 y = 6               // Point *pt1 = new Point(5, 6);
Copy Constructor : x = 15 y = 16        // Point pt2( *pt1 );
Constructor : x = 0 y = 0               // Point pt3;
Assignment Constructor : x = 35 y = 36  // pt3 = pt2;
Distructor : x = 4 y = 5                // delete pt1;
main code end
Distructor : x = 34 y = 35              // release pt3
Distructor : x = 14 y = 15              // release pt2