The paper states the normal procedure in a simple and interesting way, in which object-oriented visual programing tool is used to carry out program design.

用一种简单有趣的方式，叙述了利用面向对象的可视化编程工具进行软件设计的一般过程。

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This paper adopted the visual and object-oriented program method, and presented the topology and fault calculation results on the interface for users to observe and verify.

本文采用可视化的面向对象编程方法，通过界面显示拓扑分析、短路计算等结果，供用户查看及核对。

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