单词统计程序，使之能处理任意长度的单词。 如下功能：1.从数据文件读取字符文本 2.对单词按照频度排序(按大到小)输出。-Word statistical procedures, so that it can handle any length of words. The following functions: 1. Read characters from a text data file 2 in accordance with the frequency of word order