//
//	 Circle class
//

import java.text.DecimalFormat;
class Circle
{
	DecimalFormat f1 = new DecimalFormat("0.00");
	private double radius;
	public Circle() {  radius = 0;  }
	public void set(double r)
	{	radius = r;  }
	public double area()
	{	return Math.PI*radius*radius;  }
	public double circumference()
	{	return Math.PI*2.0*radius;  }
	public void writeOutput()
	{
		System.out.println("Area = " + f1.format(area()));
		System.out.println("Circumference = " + f1.format(circumference()));
	}
	public boolean smallerThan(Circle x)
	{
		return radius < x.radius;
	}
}