//HAM JING YI A19EC0048
//PROGRAM 9.3
#include<iostream>
using namespace std;

#define PI 3.14

class Shape{
	public:
		Shape(){}
		virtual int getArea() const
		{
			return 0;
		}
};

class Circle:public Shape{
	private:
		double r;
	
	public:
		Circle(int _r)
		{
			r=_r;
		}
		int getArea() const
		{
			return PI*r*r;
		}
};

class Rectangle:public Shape{
	private:
		int width, length;
	
	public:
		Rectangle(int w, int l)
		{
			width=w;
			length=l;
		}
		int getArea() const
		{
			return width*length;
		}
};

int main()
{
	Shape *p;
	
	Shape s;
	Circle c(10);
	Rectangle r(2,6);
	
	p= &s;
	cout<<"Area = "<<p->getArea()<<endl;
	
	p= &c;
	cout<<"Area = "<<p->getArea()<<endl;
	
	p= &r;
	cout<<"Area = "<<p->getArea()<<endl;
	
	return 0;
}