机械制图试题库的图形输入及数据结构

A Program for Inputting Graphics for Library with Examination Questions of Mechanical Drawing and Its Data Structure

机械制图试题库的交互式图形输入模块具有它自身的特点。本文介绍了输入设备的选择、反馈和修改,同时也介绍了图形的数据结构及解决内存不足问题的方法。

The model for interactive graphics input for The Library with Examinaticn Questions of Machanical Drawing has its own characteristics. This paper describes the choice of input devices,feedback and revision.The data structure for the graphics and the method for solving the problem with the,lack of memory are described,too.