Structured Programming With Cobol Examples

Structured Programming with COBOL Examples

As the conversion of legacy systems continues, the ability to understand embedded business rules becomes more and more critical. This ability is directly related to the structure of the programs within those systems. We also see the need to teach structured programming to a new generation of programmers who must maintain the billions of lines of existing COBOL code. The ultimate purpose of this text is to discuss how to judge the level of structure of a program. We do this by defining structured programming and then discussing how a structured program can be built through the application of the concepts of coupling and cohesion. We also show how embedded business rules of the program can be separated from the data and presentation functions. The reader will be able to use to these skills to judge and to improve the structure of a new program or an existing program.

Introduction To Cobol: A Guide To Modular Structured Programming

Structured Programming in COBOL

The two themes around which this book is written are: the design of structured computer programs based on the techniques from Jackson Structured Programming (JSP); and the methods available for coding these designs in the COBOL language. The book uses Standard COBOL in the translation of JSP program designs into COBOL code. The programs in the text have been compiled using an ANS 1985 COBOL compiler, and because of the subset of language statements used it is also possible to compile the programs using older compilers that conform to the ANS 1974 Standard. Courses for which the book is suitable are BTEC National and Higher National Computer Studies, City & Guilds examinations in computing, and degrees in Computer Studies. A free lecturer's supplement is provided with a copyright-free PC-compatible disk incorporating all the illustrative programs in the text.