using System;

namespace Indyjug {

  public abstract class Shape {
    private String unitOfMeasurement;

    public String UnitOfMeasurement {
      get {
        return unitOfMeasurement;
      }
      set {
        unitOfMeasurement = value;
      }
    }
  }

  public abstract class Shape2D : Shape {
    public virtual double ComputePerimeter() {
      return 0.0;
    }

    public virtual double ComputeArea() {
      return 0.0;
    }
  }

  public class Circle : Shape2D {
    private double radius = 0;
    private const double pi = 3.1415;

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

    public override double ComputePerimeter() {
      return 2.0 * pi * radius;
    }

    public override double ComputeArea() {
      return pi * radius * radius;
    }

    public static void Main(String[] args) {
//      try {
        if (args.Length != 2) {
          Console.WriteLine("Please enter the radius and unit of measurement");
          Environment.Exit(-1);
        }
        Shape2D shape = new Circle(Double.Parse(args[0]));
        shape.UnitOfMeasurement = args[1];
        Console.WriteLine("Perimeter = " + shape.ComputePerimeter() + " " + shape.UnitOfMeasurement);
        Console.WriteLine("Area      = " + shape.ComputeArea() + " " + shape.UnitOfMeasurement);
        Environment.Exit(0);
//      }
//      catch (Exception e) {
//      }
    }
  }
}