应用软件复杂条件处理的详细设计方法——N＋2表法

对于应用软件中复杂条件处理或加工的详细设计,针对传统的过程设计工具存在的问题,依据集合论提出了N＋2表方法.该方法通过构造特定结构的二维表——N＋2表来快速获取处理逻辑,用行扫描算法替代嵌套的多层条件判断以实现处理逻辑,更为重要的是该方法使得条件组合、动作以及二者之间的映射独立于程序和算法,通过元组增、删、改操作就可以实现处理逻辑的动态变化.多个信息系统的开发实践表明,该方法比传统方法具有明显的优势.

The Detailed Design Method for Complicated Multi-conditions Process of Application Software——N＋2 Table

During the development of application software, many problems will occur when using traditional tools in detailed design stage of complicated multi-conditions process. A new method called ＂N ＋ 2 table＂ is then proposed on the basis of set theory in this paper. With the method, a particular two-dimensional table, N ＋ 2 table, is constructed to acquire process logics rapidly. When programming process logics, the algorithm of row-scanning is adopted instead of nested multi-layer ＂/F-THEN-ELSE＂ structures. Furthermore, the method makes independent of algorithm the combinations of conditions, actions and the mapping between them. Thus it makes the dynamic changes of process logics come true just by inserting, deleting and updating tuples. The method has been applied to the development of some application system. Practice indicates that it has obvious advantages over the traditional methods.