.Net学习笔记----2015-07-21(C#基础复习08，模拟移动硬盘U盘等)

    /// <summary>
    /// 由于不知道到用户插入的是什么设备，所以使用抽象类
    /// 含有每个设备都具备的读和写2个方法
    /// </summary>
    public abstract class DiskFather
    {
        public abstract void Read();
        public abstract void Write();
    }

    class MobileDisk : DiskFather
    {
        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");
        }
    }

    class UDisk : DiskFather
    {
        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");
        }
    }

    class MP3 : DiskFather
    {
        public void PlayMusic()
        {
            Console.WriteLine("MP3可以播放音乐");
        }
        public override void Read()
        {
            Console.WriteLine("MP3在读取数据");
        }

        public override void Write()
        {
            Console.WriteLine("MP3在写入数据");
        }
    }

    /// <summary>
    /// 电脑类
    /// </summary>
    class Cpu
    {
        public DiskFather DF
        { get; set; }
        public void CpuRead()
        {
            this.DF.Read();
        }
        public void CpuWrite()
        {
            this.DF.Write();
        }
    }

        static void Main(string[] args)
        {
            MobileDisk md = new MobileDisk();
            MP3 mp3 = new MP3();
            UDisk ud = new UDisk();

            Cpu cpu = new Cpu();
            //cpu.DF = md;//子类可以赋值给父类
            //cpu.CpuRead();
            //cpu.CpuWrite();

            //cpu.DF = mp3;
            //cpu.CpuRead();
            //cpu.CpuWrite();

            cpu.DF = ud;
            cpu.CpuRead();
            cpu.CpuWrite();

            Console.ReadKey();
        }
    }