问题描述：设计一个行编辑程序，使其具有通常行编辑器(如Vi、Edlin)应具备的基本功能。

基本要求：编辑器应具备对文本文件的查找、插人、删除、修改、字符串替换、统计字数，统计行数等功能，对于超过一屏的长文件，应能够分页显示，查找功能用字符串匹配算法实现。设计用户接口命令，实现对文本的编辑。

可以支持“* ”、“? ”等通配符-Problem Descr iption: design a line editor, which is usually a line editor ( such as Vi, Edlin ) should have the basic functions.Basic requirements: the editor should have the text document search, insert, delete, modify, string replacement, statistical number row number, statistics and other functions, for more than one screen long document, should be able to display, search function using string matching algorithm. Design of user interface commands, the realization of a text editor.Can support the"*","?" wildcard