文本编辑程序是利用计算机进行文字加工的基本软件工具，实现对文本文件的插入、删除等修改操作。限制这些操作以行为单位进行的编辑程序称为行编辑程序。
被编辑的文本文件可能很大，全部读入编辑程序的数据空间（内存）的做法既不经济，也不总能实现。一种解决方法是逐段地编辑。任何时刻只把待编辑文件的一段放在内存，称为活区。试按照这种方法实现一个简单的行编辑程序。设文件每行不超过320个字符，很少超过80字符。
Text editor program is the use of computer text processing the basic software tools to achieve the insertion of a text file, delete, such as amendments to the operation. Restrictions on these operations units to conduct the editorial process is called line editing process. By editing a text file can be significant, all read into the editorial process data space (memory) is not economic, not always able to achieve. A solution is to edit the paragraph by paragraph. Any time only to edit the document to be placed on a section of memory, known as the living area. Test in accordance with this method to achieve a simple line editing process. Each line is not set up a document more than 320 characters, rarely more than 80 characters. (2007-12-19, C++ Builder, 2KB, 下载10次)