一个手机短信模拟系统：UML建模和C#实现

开发一个手机短信模拟系统，功能包括发送、接收、收费、通信录和收发件箱。文章以UML模型驱动系统的需求分析、设计和实现，即使用用例图、类图、状态图、顺序图和部署图描述系统的静态结构和动态行为。运用面向对象方法建模和编程，如模块化、继承、重定义和信息隐蔽。使用C#语言编程，系统运行在微软．NET环境上。

A Simulation System for Cell-Phone Short Messages: UML Modeling and C# Implementation

A simulation system for cell-phone short messages is developed, including its functions of sending, receiving and bill payment, address directory, in/out box. The requirement analysis, design and implementation of the system are driven by UML model; that is, the diagrams of use case, class, state, sequence and deployment are used to describe the static structure and dynamic behavior of the system. The object-oriented methodology is applied for modeling and programming, such as modularization, inheritance, redefinition and information hiding. The system is programmed in C# and run on the Microsoft .NET Framework.