COBOL JSP
Jackson Structured Programming
JSP (Jackson Structured Programming - not the modern usurper of the acronym!) was invented by Michael Jackson (no, not that Michael Jackson) in 1975. I started using it with COBOL in 1976.
There are 4 design steps:
| 1. |
Draw data structure diagrams that describe each of the serial data strams input to or output from the program. |
| 2. |
Define the correspondences between the different data structures and use these to combine the data structures into a single data structure. |
| 3. |
First list the executable operations required to produce the output from the input and then allocate them to the program structure. |
| 4. |
Convert the program from the diagrammatic representation into a textual form and add the conditions to iteration and selection components. |
There are three kinds of structures: selection, sequence and iteration.
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