哈夫曼树的生成以及哈夫曼书的建立，排序，插入。删除等功能-hafuman tree create,sort,insert,delete.

单链表的基本操作、插入、删除、逆转、按地址排序、归并等操作，均采用指向指针的指针来完成。-The basic operation of a single linked list, insert, delete, reverse, sort by address, merge, etc, are used to complete the pointer to a pointer.

从txt文件中读取百万级别单词，并以此建立字典树，同时实现出现频率排序、插入、查找等功能-Txt file read from the word million level, and in order to establish the dictionary tree, while achieving the frequency sort, insert, search and other functions