说明：  C语言深度剖析 C语言使用的要点，对C语言的关键字的使用、函数调用、指针、结构体、文件读写等做了深入剖析，许多内容一般的教科书没有涉及
(C language depth analysis of the main points of the C language, use the C language keywords, function calls, pointer, structure, file reading and writing in-depth analysis, many elements of the textbook does not involve)