Circle

public class Program {
		//Nikki Forehand
		//April 3, 2019
	public static void main(String[] args) {
		Circle c = new Circle ();
		System.out.println(c.getRadius());
		System.out.println(c.getDiameter());
		System.out.println(c.getCircumfrence());
		System.out.println(c.getArea());
	}

}

class Circle {
	double radius;

	public Circle() {
		radius = 1 ;
	}

	public Circle(double r) {
		radius= r;
	}

	public double getRadius () {
		return radius;
	}

	public double getDiameter() {
		return radius * 2 ;
	}

	public double getCircumfrence() {
		return Math.PI * radius * 2 ;
	}

	public double getArea() {
		return Math.PI * radius * radius;

	}
}