analyze and design the key arithmetic particularly using ooa and ood technology.
运用面向对象分析与设计技术分析并设计了该系统;
unified modeling refers to the software modeling technology which documents ooa and ood with uml while applying rup to software development process.
统一建模是指采用uml语言并运用rup过程进行软件系统建模的技术。
the system combine the theory of ooa and ood , at the same time make use of the design patterns , to attain good expansibility and function.
该系统结合了ooa和ood的理论,又对该理论进行了适当的扩展,并且结合设计模式来实现,以期达到良好的扩展性和运行效率。