public class X179Circle
{
	double radius;
	final double pi = 3.141596;

	public void setRadius(double r)
	{
		radius = r;
	}

	public double getRadius()
	{
		return radius;
	}

	public double Area(double area)
	{
		area = (radius * radius) * pi;
	}

	public double Diameter(double diameter)
	{
		diameter = radius * 2;
	}

	public double circum(double circum)		//circumference method
	{
		circum = diameter * pi;
	}
}