Reader Feedback and Insights: Indicators in RPG II Programs
November 15, 2002 Timothy Prickett Morgan
Just a comment on your good ideas (which were published in the article, “Help with RPG II Programs,” in the November 1 issue of Midrange Guru) for making System/36 style code easier to use.
I have gotten in the habit of using the DO op code to group calculations that have the same conditioning indicators .
For example, consider a group of calculations conditioned by indicator 25:
CHAIN 25 N25 MOVE N25 Z-ADD N25 etc.......
I would group them like this:
CHAIN 25 N25 DO MOVE Z-ADD etc....... END
It saves me from loading “fieldicators” and therefore it is more justifiable for me to use it on just a few lines of code. I wouldn’t, for instance, create a “fieldicator” for the three-line example as shown above, but I might group them with a DO op code .
I really feel for your reader, too. I’ve had programmers that never learned RPG II originally, and they just can’t get a feel for reading it! It’s kind of scary how easy it still is for me.
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