Graphic.h

#ifndef GRAPHICS_H
#define GRAPHICS_H

#define PI 3.14

class Graphic
{
public: 
	virtual double get_area() const = 0;
};

class Graphic3D : public Graphic
{
public:
	virtual double get_volume() const = 0;
};

class circle : public Graphic
{
public:
	double get_area() const override;
	double get_radius() { return radius; }
protected:
	double radius;
};

class rectangle : public Graphic
{
public:
	double get_length() const { return length; }
	double get_width() const { return width; }
	double get_area() const override;
protected:
	double width;
	double length;
};

class sphere : public Graphic3D
{
public:
	double get_area() const override;
	double get_volume() const override;
protected:
	double radius;
};

class cone : public Graphic3D
{
public:
	double get_area() const override;
	double get_volume() const override;
protected:
	double radius;
	double busbar;
};

#endif