// A driver of circle

import java.util.Scanner;
class TestCircle
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);

		Circle one = new Circle();	// radius = 0;
		//one.writeOutput();

		boolean go = true;

		while(go)
		{
			System.out.print("\nInput raius: ");
			double r = input.nextDouble();

			one.set(r);
			one.writeOutput();

			System.out.print("\n\nGo on? (y/n) ");
			String ans = input.next();	// "y" or "n"
			if(ans.equalsIgnoreCase("n"))
				go = false;
		}

		System.out.println("\n\n\nDone.\n\n");
	}
}