#include <graphics.h>
#include <conio.h>
#include <stdio.h>

class Coord
{
public:
	int x;
	int y;
	int	vis;

	Coord(int x = 0, int y = 0);
	virtual void draw() = 0;
};

Coord::Coord(int _x, int _y)
	: x(_x)
	, y(_y)
	, vis(1)
{
}

class Point : public Coord
{
public:
	Point(int x = 0, int y = 0);
	virtual void draw();
};

Point::Point(int x, int y)
	: Coord(x, y)
{
}

void Point::draw()
{
	if (vis)
		putpixel(x, y, WHITE);
}

class Circle : public Coord
{
public:
	int r;

	Circle(int x = 0, int y = 0, int r = 0);
	virtual void draw();
};

Circle::Circle(int _x, int _y, int _r)
	: Coord(_x, _y)
	, r(_r)
{
}

void Circle::draw()
{
	if (vis)
		circle(x, y, r);
}

class Arc : public Circle
{
public:
	int sa;
	int ea;

	Arc(int x = 0, int y = 0, int r = 0, int sa = 0, int ea = 0);
	virtual void draw();
};

Arc::Arc(int x, int y, int r, int _sa, int _ea)
	: Circle(x, y, r)
	, sa(_sa)
	, ea(_ea)
{
}

void Arc::draw()
{
	if (vis)
		arc(x, y, sa, ea, r);
}

int main()
{
	int gd = DETECT;
	int gm;

	initgraph(&gd, &gm, "../bgi");

	Point	p(50, 50);
	Circle	c(100, 50, 25);
	Arc		a(200, 35, 25, 0, 100);

	p.draw();
	c.draw();
	a.draw();
	getch();
	cleardevice();

	p.x = 100;
	c.r = 50;
	a.vis = 0;
	p.draw();
	c.draw();
	a.draw();
	getch();

	closegraph();
	restorecrtmode();
	return 0;
}