using System;

public class Program

{

    class circle

    {

        private double y ;

        private double x;

        private double r;

        private double o;

        private double ocean;

        public circle (double y,double x,double r)

        {

            this.x = x;

            this.y = y;

            this.r = r;

        }

        public void  setx (double x)

            {

                this.x=x;

            }

          public double getx()

          {

              return this.x;

          }

        public void sety (double y)

        {

            this.y=y;

        }

        public double gety()

        {

            return this.y;

        }

        public void setr (double r)

        {

            this.r=r;

        }

        public double getr()

        {

            return this.r;

        }

        public override string ToString()

        {

        return"the x:" + this.x + "the y:"+this.y+"the r"+this.r;

        }

        public double geto ()

        {

            o = 3.14 * Math.Pow(r,2.0);

            return this.o ; 

        }

        public void setocean (double ocean)

        {

            this.ocean=2*r*3.14;

        }

    }

      public static void Main()

    {

        circle c1=new circle(4,5.5,4.9);

        Console.WriteLine(c1);

        circle c2=new circle(4,7.5,4.9);

        Console.WriteLine(c2);

        circle c3=new circle(6,7.0,4.1);

        Console.WriteLine(c3);

      }

}

​