针对大型项目开发,为了保证软件产品质量,提高软件开发效率,在进行详细设计、程序设计之前,必须先确定软件总体结构,而结构化设计方法是进行软件总体结构的主要方法.该方法以需求分析阶段获得的数据流图为基础,通过一系列映射,把数据流图变换为软件结构图.在此主要分析了不同类型数据流图如何“映射”成软件总体结构,并给出了优化软件结构的规则,及不同类型数据流图“映射”成软件总体结构图时顶层、第1层及其下层的转换方法,其可操作性强.%For large-scale project development, the general software structure must be confirmed to guarantee the quality of the software product and improve the software development efficiency before a detailed design and program design. The structured design method is a main method to design the general structure of software, The method takes the data flow diagram obtained in the requirement analysis stage as a foundation to convert the data flow graphs to the software structure diagrams through a series of maps. This paper analyzes how different types of data flow diagrams map into the software general structure and gives the rules of optimizing software structure. The innovation is a conversion method of top layer, first layer and bottom layer when a different type of data stream graph is converted into a general software structure diagram. The method has a strong operability.
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