说明：  C++ IO流库教程资料 PDF，包括了一些关于IO流库的问答和解说，后面附有IO流库的基础知识介绍，其中并附有了丰富的代码实例来说明问题，若需要了解详细的C++ IO流相关知识，这个小册子还是不错的。
(C ++ IO Stream Library Tutorial Materials PDF, including some Q & A and explanations about the IO Stream Library, followed by an introduction to the basics of the IO Stream Library, which is accompanied by a rich code example to illustrate the problem. If you need to know the detailed C ++ IO stream related knowledge, this booklet is good.)