using System;

public class Program

{

        class circle

    {

        double x;

        double y;

        double r;

        public circle (double x, double y, 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()

        {

            string TexT;

            TexT="x="+ this.x+"\ty="+this.y+"\tr="+ this.r;

            return TexT;

        }

        public double area()

        {

            return(r*r*3.14);

        }

        public double circumference()

        {

            return(2*r*3.14);

        }

    }

            public static void Main()

            {

                circle c1= new circle (5,7,8);

                Console.WriteLine(c1);

                Console.WriteLine("the area={0}\t the circumferenc={1}\n",c1.area(),c1.circumference());

                circle c2= new circle (9,1,7);

                Console.WriteLine(c2);

                Console.WriteLine("the area={0}\t the circumferenc={1}\n",c2.area(),c2.circumference());

                circle c3= new circle (4,6,3);

                Console.WriteLine (c3);

                Console.WriteLine("the area={0}\t the circumferenc={1}\n",c3.area(),c3.circumference());

            }

​

}