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

用于通信行业领域，输出一些特定的脉冲波，如连续时间周期三角波、方冲脉波-For the communication industries, certain pulse output, such as continuous-time periodic triangular wave, square red pulse