RE: Strange result with exponents... -- RPG400-L

This is one of the reasons why you don't presume that EVAL will yield
"correct answers". IBM is using floating point on EVAL, that is a well known
fact. Why did they decide to do that?  Who cares? Even though it was a wron
decision, in my opinion, it is water under the bridge now. 
One of the reasons we use RPG is because it did math "correctly".
Now RPG (using EVAL) does math just as inaccurately as most other languages
and we have to get used to that, or use some of those crazy %DEC  or
EVAL(M|R|H) things.  It is easier to use MULT/DIV if you want correct math
results, in my view.
-Bob Cozzi


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of rob@xxxxxxxxx
Sent: Tuesday, February 17, 2004 12:16 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: Strange result with exponents...

IBM's response:

Rob, 
I just spoke with the RPG developer. The sample you provided will not 
give you consistent results because the calculations are done with 
floating point math with large numbers. If you were to do the 
calculation using multiplication in a loop you would receive the exact 
calculation at the end of the loop. 
 
This limitation of floating point math is not specific to RPGLE but is 
explained in the RPG Programming manual. Let me know if you have further
questions.

So, whomever posted this question, was this already answered in like 
fashion on the other list?

Rob Berendt
-- 
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





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Re: Strange result with exponents...






IBM recommended the following ptf:  MF32083.  However that didn't do it 
for me.  I even recompiled the program, signed off, and back on.  Back to 
the drawing board...

Rob Berendt
-- 
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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