练习：电脑、移动硬盘、U盘、MP3

    class Program
    {
        static void Main(string[] args)
        {
            /* 用多态来实现 将 移动硬盘或者U盘或者MP3插到电脑上进行读写数据 */
            //MobileDisk md = new MobileDisk();
            //UDisk u = new UDisk();
            //Mp3 mp3 = new Mp3();
            //Computer cpu = new Computer();
            //cpu.CpuRead(u);
            //cpu.CpuWrite(u);
            //Console.ReadKey();

            MobileStorage ms = new UDisk();//new Mp3();//new MobileDisk();//new UDisk();
            Computer cpu = new Computer();
            cpu.Ms = ms;
            cpu.CpuRead();
            cpu.CpuWrite();
            //Computer cpu = new Computer();
            //cpu.CpuRead(ms);
            //cpu.CpuWrite(ms);
            Console.ReadKey();
        }
    }

    /// <summary>
    /// 抽象的父类
    /// </summary>
    public abstract class MobileStorage
    {
        public abstract void Read();
        public abstract void Write();
    }

    public class MobileDisk : MobileStorage
    {
        public override void Read()
        {
            Console.WriteLine("移动硬盘在读取数据");
        }

        public override void Write()
        {
            Console.WriteLine("移动硬盘在写入数据");
        }
    }

    public class UDisk : MobileStorage
    {
        public override void Read()
        {
            Console.WriteLine("U盘在读取数据");
        }

        public override void Write()
        {
            Console.WriteLine("U盘在写入数据");
        }
    }

    public class Mp3 : MobileStorage
    {
        public override void Read()
        {
            Console.WriteLine("MP3在读取数据");
        }

        public override void Write()
        {
            Console.WriteLine("Mp3在写入数据");
        }

        public void PlayMusic()
        {
            Console.WriteLine("MP3自己可以播放音乐");
        }
    }

 

    public class Computer
    {
        private MobileStorage _ms;

        public MobileStorage Ms
        {
            get { return _ms; }
            set { _ms = value; }
        }

        public void CpuRead()
        {
            Ms.Read();
        }

        public void CpuWrite()
        {
            Ms.Write();
        }
    }