using System;

public class Shape{

    string name;

    public Shape(){

        name = "Unknown";

    }

    public void setName(String name){

        this.name = name;

    }

    public String getName(){

        return name;

    }

}

public class Circle:Shape{

    double rad;

    public Circle(){

        rad = 1.0;

    }

    public Circle(String name, double rad){

        //this.name = name;

        setName(name);

        this.rad = rad;

    }

    public void setR(double rad){

        this.rad = rad;

    }

    public double getR(){

        return rad;

    }

    public double getArea(){

        double area = Math.PI * rad * rad;

        double ar = Math.Round(area, 3);

        return ar;

    }

}

public class Program

{

    public static void Main()

    {

        Circle c1 = new Circle();

        //c1.setR(2.2);

        //c1.setName("Circle 1");

        Console.WriteLine("Name is {0}, Radius is {1} ,Area is {2} " ,c1.getName(),c1.getR(), c1.getArea());

        Console.WriteLine("\n Next OBJ \n");

        Circle c2 = new Circle("Circle 2", 4.4);

        Console.WriteLine("Name is {0}, Radius is {1} ,Area is {2} " ,c2.getName(),c2.getR(), c2.getArea());

    }

}