TCP网络编程，使用多线程及select函数实现多人聊天功能，C/S模式。-TCP network programming, the use of multithreading and select Function people chat, C / S mode.

C、C++中经常使用的一些函数的实现，专家大作，值得一看-C, C++ frequently used in the realization of some functions, experts masterpiece, worth a visit! !