7.Area Calculation using INTERFACE

Area Calculation using  INTERFACE

namespace interfacearea

{

    interface area

    {

            double compute(float x,float y);

    }

    class rectangle : area

    {

        public double compute(float x, float y)

        {

            return (x * y);

        }

    }

    class circle : area

    {

        public double compute(float x, float y)

        {

            return (3.14 * x * x);

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            int l,b,r;

            Console.WriteLine("Enter Length of Rectangle");

            l = int.Parse(Console.ReadLine());

            Console.WriteLine("Enter Breadh of Rectangle");

            b = int.Parse(Console.ReadLine());

            Console.WriteLine("Enter radius of Circle");

            r = int.Parse(Console.ReadLine());

            rectangle rect = new rectangle();

            circle cir = new circle();

            area a;

            a = rect;

            Console.WriteLine("Area of Rectangle "+ a.compute(l,b));

            a = cir;

            Console.WriteLine("Area of circle " + a.compute(r,0));

            Console.ReadLine();

        }    }    }