c#中接口、抽象类、继承综合小练习

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            //作业:橡皮rubber鸭子、木wood鸭子、真实的鸭子realduck。
            //三个鸭子都会游泳，而橡皮鸭子和真实的鸭子都会叫，
            //只是叫声不一样，橡皮鸭子“唧唧”叫，真实地鸭子“嘎嘎”叫，木鸭子不会叫.

            Duck dk = new RealDuck();
            dk.Swim();
            IBark ib = new RealDuck();
            ib.Bark();
            Console.ReadKey();
        }
    }
    //为抽象类
    public abstract class Duck
    {
        public abstract void Swim();
    }
    //接口
    public interface IBark
    {
        void Bark();
    }

    public class RealDuck : Duck, IBark
    {
        public void Bark()
        {
            Console.WriteLine("真的鸭子嘎嘎叫");
        }

        public override void Swim()
        {
            Console.WriteLine("真的鸭子会游泳");
        }
    }

    public class MuDuck : Duck
    {
        public override void Swim()
        {
            Console.WriteLine("木头鸭子也会游泳");
        }
    }

    public class XPDuck : Duck, IBark
    {
        public void Bark()
        {
            Console.WriteLine("橡皮鸭子唧唧叫");
        }

        public override void Swim()
        {
            Console.WriteLine("橡皮鸭子也会游泳");
        }
    }
}