说明：  no intro
(21:00 game multiplayer online edition. Familiar with and master the basic network programming methods and procedures experimental purposes (1) (2) to further the understanding of the client/server interaction mode (3) to deepen students' understanding of the game program design and implementation methods (4) be familiar with socket programming interface master socket programming interface developed for connection-oriented network applications. 2. Experimental task requirements: (1) understand the stand-alone version of the 21:00 game program (2) implementation of the graphical user interface (3) online edition (4) multiplayer game )