说明：  本文描述在网上能够找到的最简单，最快速的哈夫曼编码。本方法不使用任何扩展动态库，比如STL或者组件。只使用简单的C函数，比如：memset，memmove，qsort，malloc，realloc和memcpy。 大家都会发现，理解甚至修改这个编码都很容易
(This article describes the Internet to find the simplest, fastest Huffman. This method does not use any extension of the dynamic libraries, such as STL or components. Only using a simple C function, such as: memset, memmove, qsort, malloc, realloc and memcpy. We will find, understand and even modify the code easily)