用C实现了线程安全的哈希表，AVL树、红黑树、HTTP客户端等等，不错的开源库，推荐使用-Achieved with C thread-safe hash table, AVL tree, red and black tree, HTTP client, etc., a good open-source database, recommend the use of

C++的手机话费管理系统，转载感觉很不错，上传给大家参考。-C++ phone bill management system, reproduced ， feeling very good, upload to your reference.

一个非常不错的信号处理库，采用C++模板编写而成，可以直接添加到现有工程中。压缩包里包括源码、配套的三方库文件，以及一个详细的工具箱使用手册。(It is a very good signal processing library, written with C++ template, which can be directly added to your existing project. The compressed package includes source code, support