本源码可以用于读取一个文本文件中带字母的数据行，从而可以快捷的获取自己想得到的信息。-The source can be used to read a text file with a letter rows, so you can quickly access their desired information.

该系统是ＤＯＳ界面，用来实现统计读取的文本中的不同类型字符的个数。-The system is DOS interface, used to achieve statistical reading of the text of the number of different types of characters.