说明：  　　　即时聊天工具其功能类似于QQ，能够实现注册、登录、添加好友、文字聊天、文件传输、语音聊天、视频聊天等功能。该聊天软件系统是采用C/S结构，也就是客户端与服务器端的结构体系，基于对该聊天软件功能的分析，分别对客户端与服务器端进行设计。
(　　Its function is similar to instant messaging tool QQ, can be registered, log, add friends, text chat, file transfer, voice chat, video chat and other functions. The chat software system is the use of C/S structure, which is the client-side and server-side architecture, based on the analysis of the chat software features, respectively, the client and server-side design.)