class Circle
{
int r;
static double PI=3.14;
public int GetR(int r)
{
this.r=r;
return r;
}
public void GetZ()
{
System.out.println(2*PI*r);
}
public void GetArea()
{
System.out.println(PI*r*r);
}
}
class Cylinder extends Circle
{
int height;
public void GetCylinder(int r,int height)
{
this.r=r;
this.height=height;
}
public void GetZ()
{
System.out.println(PI*r*r*height);
}
public void GetArea()
{
System.out.println(2*PI*r*r+2*PI*height);
}
}
class Ex
{
public static void main(String args[])
{
Circle p=new Circle();
System.out.println( p.GetR(2));
p.GetZ();
p.GetArea();
Cylinder p1=new Cylinder();
p1.GetZ();
}
}