填空题
结构化设计方法的实现要点是“自顶向下，（）”，“由粗到细，（）”。
发布日期：2020-04-11
试题解析
结构化设计方法
结构化设计方法给出一组帮助设计人员在模块层次上区分设计质量的原理与技术。它把系统作为一系列数据流的转换，输入数据被转换为期望的输出值，通过模块化来完成自顶而下实现的文档化，并作为一种评价标准在软件设计中起指导性作用，通常与结构化分析方法衔接起来使用，以数据流图为基础得到软件的模块结构。
- 中文名
- 结构化设计方法
- 软件设计
- 解决“怎么做”
- 软件需求
- 解决“做什么”
- 领域
- 设计
自顶向下
自顶向下（top-down）的分析算法通过在最左推导中描述出各个步骤来分析记号串输入。将大型的数字电路设计分割成大小不一的小模块来实现特定的功能，最后通过由顶层模块调用子模块来实现整体功能，这就是Top-Down的设计思想。
- 中文名
- 自顶向下
- 意义
- 将复杂的问题分解为简单的小问题
- 优点
- 相互关系及重建行为更为简单
- 外文名
- top-down
- 类别
- 比较传统的方法
- 应用学科
- 机械工程、仪器科学
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