include<iostream> usingnamespacestd; classVGA { public: virtualvoidplay()=0; }; //TV01表示支持VGA接口的投影仪 classTV01:publicVGA { public: virtualvoidplay() { cout<<"通过VGA接口链接投影仪,进行视频播放"<<endl; } }; //实现一个电脑类(只支持VGA接口) classComputer { public: voidplayVideo(VGApVga) { pVga->play();...