关键词: 静态分析, 软件工程, 用况图, 程序理解

Abstract: Use case diagram is an effective way to express system functions from the perspective of the user, which is often used to describe system demands. If use case diagram of program can be abstracted from the system source code directly, that will be of great help for user to understand program. Based on this idea, a reverse engineering method to enhance program comprehension for user is designed in this paper. A tree graph express structure of source codes is abstracted by using the static analysis method. By setting metric value of the nodes of the tree graph, the weighted tree diagram can be generated. According to the metric it sets, the nodes of the tree graph can be clipped, which controls program complexity. Execution paths of the software, which are the candidates of use cases, are obtained by traversing the clipped tree graph. With the help of graphic tool, use case diagrams can be abstracted from the candidates of use cases, and experimental analysis has gained good effects.

Key words: static analysis, software engineering, use case diagram, program comprehension