public class CircleTester
{

    public static void main(String[] args)
    {
        Circle cirA = new Circle();
        Circle cirB = new Circle(24.7);
        System.out.println(" the radius of cirA is " + cirA.getRadius());
        System.out.println(" the radius of cirB is " + cirB.getRadius());
	System.out.println(" the diameter of cirB is " + cirB.getDiameter());
	System.out.println(" the circumference of cirB is " + cirB.getCircumference());
	System.out.println(" the area of cirB is " + cirB.getArea());
	System.out.println("??????" + cirB);
    }
}