When the system requirement is being analyzed, according to the theory of object-oriented analysis, firstly the definition of the object layer, attribute layer and relation layer is accomplished.

• 在系统需求分析中,按照面向对象的分析技术理论,实现了对系统对象层、特征层、关系层的定义,同时结合应用USE CASE和交互图实现对系统的功能需求进行分析,最后完成类的详细说明。