JSP for Practical Program Design

The design of this book is based on teaching the ]SP (Jackson Structured Pro­ gramming) methodology to undergaduates and postgraduates over a period of a number of years. I am grateful for the comments and feedback that have been provided by students who have taken these courses. The aim of the book is to provide readers with an understanding of the concepts behind the ]SP methodology in order that they may apply it for themselves; simply using the notation is not sufficient, it must be used appropriately. The answer to the question "Why is this wrong?" can lead to a greater understanding than a sim­ ple response to "Is this right?". I have included illegal structures as "under­ standable mistakes" in the early sections for this reason. It is not necessary for readers of this text to have experience with any par­ ticular programming language; indeed, one of the virtues of ]SP is that it is lan­ guage independent. Examples have been given in Pascal, C and COBOL as these are languages which students of ]SP are likely to have met in the course of their studies, or will be meeting while they are learning ]SP. The COBOL lan­ guage is widely used in industry in a ]SP development environment. The design of this book is based on teaching the]SP (Jackson Structured ProƯ gramming) methodology to undergaduates and postgraduates over a period of a number of years. I am grateful for the comments and feedback that have been provided by students who have taken these courses. The aim of the book is to provide readers with an understanding of the concepts behind the]SP methodology in order that they may apply it for themselves; simply using the notation is not sufficient, it must be used appropriately. The answer to the question "Why is this wrong?" can lead to a greater understanding than a simƯ ple response to "Is this right?". I have included illegal structures as "underƯ standable mistakes" in the early sections for this reason. It is not necessary for readers of this text to have experience with any parƯ ticular programming language; indeed, one of the virtues of]SP is that it is lanƯ guage independent. Examples have been given in Pascal, C and COBOL as these are languages which students of]SP are likely to have met in the course of their studies, or will be meeting while they are learning]SP. The COBOL lanƯ guage is widely used in industry in a]SP development environment Front Matter....Pages i-xiii Introduction....Pages 1-6 Data structures....Pages 7-28 Input and output data file structures....Pages 29-33 Correspondences and process structures....Pages 35-50 Creating the final process structure....Pages 51-57 Adding conditions and operations....Pages 59-69 Generating schematic logic....Pages 71-90 Producing code....Pages 91-104 Error handling....Pages 105-124 Case study in program design for interactive systems....Pages 125-143 Backtracking....Pages 145-153 Structure clashes and program inversion....Pages 155-190 Program dismemberment....Pages 191-206 Dealing with multiple input files....Pages 207-218 Getting started with jsp -Tool....Pages 219-256 Getting started with PDF....Pages 257-269 Back Matter....Pages 271-305 JSP is intended for both educational and commercial arenas, as it allows for easy maintenance, modification and straightforward code conversion. This is an ideal first course book for novice programmers and is suitable for students of computer science, information technology and business computing who are approaching JSP for the first time. Why should a programming methodology be used?