1、分析典型网络聊天应用软件（如QQ、MSN等）的实现原理，模拟设计一套网络聊天应用程序，必须实现以下功能：

①按照C/S结构分别设计服务端程序和客户端程序；

②服务端通过图形用户界面实现对服务器的控制，负责维护用户帐户和用户群，并维护用户信息、维持客户端之间的端对端通信和群聊通信、适时维护用户在线信息，并能够发送广播消息。

2、增加尽可能多的功能，用户界面友好，操作简便，代码设计遵从程序设计规范，易读性强，对关键过程和代码进行标注说明。

3、程序设计过程遵从软件工程规范，有需求分析、系统设计和详细设计过程，有相应的规范化说明文档。

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1, analyzing typical network chat application (such as QQ, MSN, etc) and the realization of the principle, the simulation design a set of network chat application, must meet the following functions:

(1) respectively in accordance with C/S structure design service the program and the client program

(2) the server through the graphical user interface to realize the control of the server, and is responsible for maintaining the user account and the user group, and maintain customer information between the client and maintain the end-to-end communication and group chat communication, timely maintenance users, and to send information online radio news.

2, increase as many of the function, user friendly interface, easy operation, and code design program design specifications, follow strong sex is easy to read, to key process and the code that to mark.

3, program design process of software engineering, have to comply with the standard requirement analysis, system design and detailed des