//
//	 Cylinder class
//

import java.text.DecimalFormat;
class Cylinder
{
	DecimalFormat f1 = new DecimalFormat("0.00");
	private double radius;
	private double height;

	public Cylinder()
	{
		radius = 0;
		height = 0;
	}
	public Cylinder(double r, double h)
	{
			radius = r;
			height = h;
	}

	public void set(double r, double h)
	{
			radius = r;
			height = h;
	}
	public double volumn()
	{
		return height*Math.PI*radius*radius;
	}
	public void writeOutput()
	{
		System.out.println("Vol: " + f1.format(volumn()));

	}

}