说明：  linux c函数手册,CHM格式,带函数索引,方便查找,涵盖了所有常用的linux C函数,绝大多数函数带有简单明了的示例,绝对不同于别的粗制滥造的手册
(linux c function manual, CHM format, with the index function to facilitate the search, covering all commonly used linux C function, the vast majority of functions with simple and clear example of shoddy absolutely different level of manual)