Re: RPG Cycle

[pcunnane@xxxxxxxxxxxxxx]

     It quickly becomes a hair-splitting excercise, but splitting hairs is 
     sometimes the most effective way to understand something in detail.
     
     When you create an RPG program, the compiler inserts the cycle code.  
     It's always there.  If you don't have a primary file, chunks of the 
     cycle don't get executed (such as primary input, total output), but 
     they are still there.  When the mainline of your code executes, it is 
     the first cycle of the detail time calculations.  To prevent your 
     program from looping through the cycle indefinitely, you have to set 
     LR or execute a RETRN/return.
     
     Coding H NOMAIN prevents the cycle code from being included in the 
     program at all.
     
     To say that every programming language has a cycle of sorts is to 
     misunderstand how the cycle works.  There is no way to get a C program 
     to constantly repeat its main() routine; you have to code a loop 
     within main().  RPG will happily repeat the mainline C-specs until it 
     finds an explicit exit.
     
     Peter Dow:  I loved your non-primary cycle example!
     
     ____________
     Paul Cunnane


______________________________ Reply Separator _________________________________
Subject: Re: RPG Cycle
Author:  fkolmann@revlon.com.au at InterNet
Date:    2000-02-17 9:15 am


You said 'turn off' , what do you mean by 'turn off'. IMO not having P 
or S files
effectively turns off the cycle.
In any case every programming language has a cycle of sorts, to start 
and end a
program. Even the OS has a bootstrap program that is a 1 loop cycle.  

     (snip)
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