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.

文件管理，以学生信息为例，有增加、修改、删除文件的功能，还可进行文件的查找和统计以及数组的排序-Document management, information to students as an example, to increase, modify, delete files, documents can also be carried out to find and order statistics, as well as array