简单的聊天室程序实现，CS系统结构，支持基本的私聊和群聊功能。-Simple chat room procedures to achieve the CS system structure, support the basic private chat and group chat feature

为一般简单精简版的类似于QQ的聊天室软件，实现私聊，公聊，文件发送，功能完整，界面友好。(For simple and simple version of the chat room software similar to QQ, the realization of private chat, public chat, file sending, complete function, friendly interface.)