// nullyks 1-3
#include <iostream>
using namespace std;

class TFigure
{
protected:
	double value1;
	double value2;
public:
	void GiveValue(double v1, double v2){
		value1=v1;
		value2=v2;
	}

	virtual void ShowArea(void){
		cout<<"This is BaseClass and shows absolutely nothing ...\n";
	}
};

class TRectangle : public TFigure
{
public:
	void ShowArea(void){
		cout<<"The rectangle, that has width: "<<value1<<" and height: "<<value2<<" has area: "<<value1*value2<<endl;
	}
};

class TTriangle : public TFigure
{
public:
	void ShowArea(void){
		cout<<"The right-angled triangle, that has height: "<<value1<<" and height: "<<value2<<" has area: "<<(value1*value2)/2<<endl;
	}	
};

int main(void)
{
	TFigure Base;
	TRectangle Rect;
	TTriangle Triang;
	double x=5;
	double y=10;

	cout<<"Value1 is: "<<x<<endl;
	cout<<"Value2 is: "<<y<<endl;
	cout<<"----------------"<<endl;
	cout<<"Giving values to Base and calling ShowArea() ..."<<endl;
	Base.GiveValue(x,y);
	Base.ShowArea();
	cout<<"----------------"<<endl;
	cout<<"Giving values to Rectangle and calling ShowArea() ..."<<endl;
	Rect.GiveValue(x,y);
	Rect.ShowArea();
	cout<<"----------------"<<endl;
	cout<<"Giving values to Triangle and calling ShowArea() ... "<<endl;
	Triang.GiveValue(x,y);
	Triang.ShowArea();
	cout<<"All Done! Exiting ..."<<endl;
	return(0);
}