说明：  用c++语言怎样实现汉字旋转--本文通过介绍汉字点阵库的构成原理，并利用数学中的公式与编程语言，从而实现汉字的旋转。
(C++ language with how to achieve the character rotation- This paper describes the structure theory character dot matrix library, and use the formula in mathematics and programming languages to achieve the character of the rotation.)