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实现简单的聊天室设计 包括服务器和客户端的设计(Simple chat room design )

基于TCp的网络编程,一个服务器对多个客户端,用用的是多线程方法(Based on the TCp network programming, a server to multiple clients, use is a multi thread method)

用socket编程实现点对点通信，TCP客户端程序，TCP服务器程序，以及UDP点对点聊天通信。(Point to point communication, TCP client, TCP server, and UDP peer chat communication socket programming.)

网络重传选择协议，可以检查传输信息的正确性。通过接受方的校检，通知发送方重新发送。 ( Network retransmission protocol, you can check the correctness of the transmission of information. By accepting the prosecution s school to notify the sender to resend.)

实现ARQ协议的简单模拟，包括发送，确认号，等待，出错重发等等。(Realise a simple Model as ARQ Protocol)

说明：  VB 例程序讲解 、局域网聊天程序 二、可以换肤的窗体 三、richtext实现的文本编辑器 四、用OLE实现文件拖放 五、窗体卸载时弹出确认对话框 六、让控件大小随窗体改变而改变 七、拖动无标题栏窗体 八、在打开文件对话框中选择多文件 (VB procedures on cases, two LAN chat program, the Eurocargo Form 3, the realization richtext text editor 4, OLE files with drag-and-drop 5, Form unloading pop confirmation dialog box six, with the size controls Form change of seven, dragging Untitled Form 8 column, in fighting to open a file selection dialog many documents)

code of server socket for windows

倾情奉献，这是我编的一个电离层的解算程序，里面有各参数的详细说明，希望对大家有所帮助(Portrait of dedication, which I made a solution of the ionosphere counting procedures, which have a detailed description of each parameter, and they hope to help everyone)

说明：  务器端基于select I/O模型。为防止程序界面阻塞，有一个子线程用于不断接收socket并select其中的处理。客户端只有一个线程函数，不过其利用率很高，可用于远程目录交换，请求文件大小，创建若干线程来下载文件。文件传输有上传和下载,还有对等传输，这个项目中，传输文件具体指下载。(Client server based on select I/O model. Programming interfaces in order to prevent obstruction, there is a sub-thread for receiving socket and select which treatment. There is only one client thread function, but its utilization very high, can be used for remote directory exchange, request the file size, create a number of threads to download the file. File transfer are uploading and downloading, as well as peer-to-peer transmission, this project, the specific means to transfer files to download.)

说明：  模仿qq的一个小程序，值得VC++初学者学习(Qq imitate a small program, it is worth learning VC++ beginners)