CRC教研实用库，由于CRC在通讯和数据处理软件中经常采用，笔者在实际工作中对其算法进行了研究和比较，总结并编写了一个具有最高效率的CRC通用程序库。该程序采用查表法计算CRC，在速度上优于一般的直接模仿硬件的算法，可以应用于通讯和数据压缩程序。-CRC practical teaching and research library, as a result of CRC in the communications and data processing software often used in practical work, the author of its algorithms have been studied and compared, summarized and prepared with the highest efficiency of a common CRC library. The procedure used look-up table method to calculate CRC, in terms of speed is superior to the general hardware directly imitate algorithms, can be applied to communications and data compression program.