using System;

namespace soumya {

​

    public interface animal {

        void getSound();

    }

    class cat:animal 

    {

        public void getSound()

        {

            Console.WriteLine("sound of cat: meow!");

        }

    }

    class dog:animal 

    {

        public void getSound()

        {

            Console.WriteLine("sound of dog: bark!");

        }

    }

    class horse:animal 

    {

        public void getSound()

        {

            Console.WriteLine("sound of horse: neigh!");

        }

    }

    public class demo {

        public static void Main() {

            cat obj1 = new cat();

            dog obj2 = new dog();

            horse obj3 = new horse();

            obj1.getSound();

            obj2.getSound();

            obj3.getSound();

​

​

        }

    }

}