该代码功能简单的实现了聊天软件的基本功能，建立一个服务器和一个客户端，然后当用户连接到服务器的时候，可以利用客户端进行会话。(The code features simply implement the basic functions of chat software, establish of a server and a client, and then when the user is connected to the server, you can use the client to