一种软件绘图功能的面向对象实现

An OOP Implementation of Software Draw Map Function

在面向对象的程序设计中,多态性是一个十分重要的概念.本文讨论继承和虚函数实现多态性的原理,利用多态性合理安排各组件类之间的继承关系,研究软件绘图功能组件类的封装方法.

The polymorphism is a very important and useful conception in object oriented programming. This paper discusses the mechanism of implementing polymorphism by using inheritance and virtual function. It studies how to encapsulate the software's draw map module classes by using polymorphism and correctly deals with inheritance of the classes.