说明：  C语言本与末，含本篇和末篇两部分。本篇比较详尽的介绍了C语言的基础构成元素与操作， 利用代码举例说明。末篇主要讲应用，先讲述基础知识，再通过网络应用于数据库应用实例进行了介绍。最后给出了几个应用的说明与代码解释。
(And at the end of the C language, including this and the final essay in two parts. This more detailed introduction to the C language based on composition elements and operations, using the code example. The main practical application of the end of articles, first about the basics, and then applied to the database through the network application examples are introduced. Finally, a description of several applications and code interpretation.)