VAX Rdb/VMS应用程序中一种全屏幕处理技术

Full Screen Processing and Its Realization in the Application Program of VAX Rdb/VMS

1 前言 在使用VAX-11 COBOL语言编写VAX Rdb/VMS应用程序实践中,发现用ACCEPT语句编写的数据录入与修改程序用户界面存在以下缺点;a.向某一变量输入数时,如果不用选择项限制输入长度,则有时会因输入超长而破坏显示的屏幕格式;如果用选择项限制其输入长度,则要求输入数达到长度后才能被接收。b.在输入多个数时只能一个接一个顺序输入,直到最后一个输入完成,中途是不能退出的。c.在输入数据过程中,如果发现前面某个数据输错了,则这种程序不能随时将光标调回进行修改。

This paper is concerned with a simple and efficient method, the full screen processing, which is designed to improve the user interface of VAX Rdb/VMS application program by subroutine 'getnum' and 'getstr' in the application program. Emphasis is laid on the introduction of main functions and control information of the program and an example is given to illustrate the details of application of full screen processing in programs.