class Main
{
public static void main(String[] args)
{
Circle c1=new Circle();
c1.SetPiRadius(3.14,10);
c1.AreaOfCircle();
Circle c2=new Circle();
c2.SetPiRadius(3.14,20);
c2.AreaOfCircle();
Circle c3=new Circle();
c3.SetPiRadius(3.14,30);
c3.AreaOfCircle();
}
}
class Circle
{
double _pi;
int _radius;
public void SetPiRadius(double pi, int radius)
{
this._pi=pi;
this._radius=radius;
}
public void AreaOfCircle()
{
System.out.println("Area of Circle is : "+this._pi*this._radius*this._radius);
}
}