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Hi Crox I won't be a apostle of coroutines nor JSP nor any other religion. My only purpose is to show further possibilities of COBOL. With regard to your sensible questions about maintenance and alike, as soon as possible I'll show a more structured approach, where the role of virtual files...

Hi deveshjogal, Coroutines in COBOL aren't not a theoretic speculation. Personally I've been using them for circa 15 years, since the times of IBM OS/VS COBOL. Unfortunately for you, coroutines are useful especially in complex problems (fortunately), so it isn't easy to exhibit sensible...

Hi Crox, I respect your preference for program inversion, but, while JSP methodology is a precious conceptual tool available to all programmers, unfortunately the JSP precompiler isn't. Anyway the JSP itself suggests coroutines as a solution to structure clashes and considers program inversion...

IMPLEMENTING COROUTINES IN COBOL Coroutines are a simple, efficient and useful form of concurrent programming (although it is better defined as co-operative programming). Coroutines are like routines but, while there is always a hierarchical relation among common routines in a program...

In the CICS environment (on IBM mainframe) not all the COBOL statements are available. For example the DISPLAY instruction and the COBOL instructions to manage files must be substituted by suitable EXEC CICS statements. This difference between BATCH e CICS environments, make difficult to...