对简单工厂模式的第一次学习。面向对象学习的第一次编程。包括了接口继承多态。内涵EA图纸。图纸中有设计的图纸和作业要求。-It is a learn of simple factory mode .Science I have learn OOP it is the first project I have written . The project contain interface,inherit and ploymorphism. The upload files contains draw