结构化控制流程图（N－S图）的改进与模块化程序设计图的设想

IMPROVEMENT ON STRUCTURED FLOWCHART (N-S FLOWCHART) AND ASSUMPTION OF MODULAR PROGRAMMING FLOWCHART

本文简要回顾了结构化程序设计和Ｎ－Ｓ图的产生，不难看出：Ｎ－Ｓ图是应结构化程序设计的需要而产生的。近年来模块化结构化程序设计思想有了新的发展，本文正是为了适应新的情况，在反复推敲与使用的基础上，第一，提出了结构化控制流程图的改进方案，它比Ｎ－Ｓ图有更高的集成度，表示能力更强，使得用图形表示算法更方便；第二，提出了各种模块图的方案，它可以使模块化程序设计图形化，合起来就构成了一套完整的模块化结构化程序设计盒图系统，简称ＭＳ图。

In this paper, a brief review of structured programming and the emergence of N--Sflowchart is given. It is easy to know that the eme-rgence of N-S flowchart is due to the need of structured programming. In recent years, there 'have been new improvements of modular and structured programming. Jn order to be adapted to new conditions, the following two formulations are proposed on the basis of repeated deliberation and application. The first one is an improved plan of structured flowchart which has a higher degree of integration as well as greater ability of indication than N--S flowchart, and makes it more convenient to use diagrammatic algorithms, and the second one is the plan of various kinds of modular diagrams which can make modular programming diagrammatic and merge it into an integrated system of box--diagram of modular and structured programming, termed simply as 'MS--diagram'.