一个画图游戏。若干个客户通过一个服务器连接在一起，其中一个客户在自己的电脑上画图，另外的客户可以通过各自的电脑同时看到那个客户所画的图-A drawing game. Number of customers connected through a server, in which a client computer in their own drawing, other customers can see through their computer while the drawing that