#ifndef __SHAPE_HPP__
#define __SHAPE_HPP__

#include <iostream>

// parent class
class shape
{
protected:
	int x, y;

public:
	shape() { x = y = 0; }
	shape(int nx, int ny) { x = nx; y = ny; }
	void move(int nx, int ny) { x = nx; y = ny; }

	virtual void draw() = 0;	// abstract virtual function
};

class rectangle : public shape
{
protected:
	double length, width;

public:
	rectangle(double l, double w) : shape() { length = l; width = w; }

	virtual void draw()
	{
		std::cout << "Rectangle: " << "x = " << x << " y = " << y
			<< " length = " << length << " width = " << width << std::endl;
	}
};

class square : public rectangle
{

public:
	square(double s) : rectangle(s, s) { }

	virtual void draw()
	{
		std::cout << "Square: " << "x = " << x << " y = " << y
			<< " side length = " << length << std::endl;
	}
};

class triangle : public shape
{
protected:
	double base, altitude;

public:
	triangle(double b, double a) : shape() { base = b; altitude = a; }

	virtual void draw()
	{
		std::cout << "Triangle: " << "x = " << x << " y = " << y
			<< " base = " << base << " altitude = " << altitude << std::endl;
	}
};


class circle : public shape
{
protected:
	double radius;

public:
	circle(double r) : shape() { radius = r; }

	virtual void draw()
	{
		std::cout << "Circle: " << "x = " << x << " y = " << y
			<< " radius = " << radius << std::endl;
	}
};

#endif