#include <iostream>
using namespace std;

class Shape {
protected:
	int x, y;
public:
	void setOrigin(int x, int y) {
		this->x = x;
		this->y = y;
	}
	void draw() {
		cout << "Shape Draw" << endl;
	}
};

class Rectangle : public Shape {
private:
	int width, height;
public:
	void setWidth(int w, int h) {
		width = w;
		height = h;
	}
	void draw() {
		cout << "Rectangle Draw" << endl;
	}
};

class Circle : public Shape {
private:
	int radius;
public:
	void setRadius(int r) {
		radius = r;
	}
};

int main()
{
	Shape* ps = new Rectangle();	// 상향 형변환
	ps->draw();

	Rectangle* pr = (Rectangle*)ps;
	((Rectangle*)ps)->draw();		// 하향 형변환

	Shape* pc = new Circle();
	pc->draw();

	Circle* pd = (Circle*)pc;
	pd->draw();

	((Circle*)pc)->draw();
	delete ps;
//	delete pr;
}

#include <iostream>
using namespace std;

class Shape {
protected:
	int x, y;
public:
	Shape(){
		cout << "Shape 생성자" << endl;
	}
	virtual ~Shape() {
		cout << "Shape 소멸자" << endl;
	}
	void setOrigin(int x, int y) {
		this->x = x;
		this->y = y;
	}
	virtual void draw() = 0; // 순수 가상 함수
};

class Rectangle : public Shape {
private:
	int width, height;
public:
	Rectangle() {
		cout << "Rectangle 생성자" << endl;
	}
	~Rectangle() {
		cout << "Rectangle 소멸자" << endl;
	}
	void setWidth(int w, int h) {
		width = w;
		height = h;
	}
	void draw() {
		cout << "Rectangle Draw" << endl;
	}
};

class Circle : public Shape {
private:
	int radius;
public:
	void setRadius(int r) {
		radius = r;
	}
};

int main()
{
	Rectangle* r1 = new Rectangle();
	delete r1;
}