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(); }