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  • Subject: Re: [Re: RPGILE V4.3 Gotcha]
  • From: Jim Langston <jlangston@xxxxxxxxxxxxxxxx>
  • Date: Mon, 04 Oct 1999 11:39:25 -0700
  • Organization: Conex Global Logistics Services, Inc.

I agree 100%.  All other languages I program in, it is the responsibility of the
program to guard against overflow, not the compiler.  At least that way we,
as programmers, know what kind of result we're going to get back. Either
something accurate to X decimal places, or an overflow.

Now, I just hope I can remember to stick an 'R' in the header, when generally
I never even include a header.

Regards,

Jim Langston

Joel Fritz wrote:

> Have you looked at the manual on precision for intermediate results for
> eval?  The default precision will often produce downright odd results.  You
> can use EXPROPTS(*RESDECPOS) in an H spec to make all  intermediate results
> in expression evaluation have the same precision as the result field, or use
> the "r" operation extender with eval.  The manual gives some interesting
> cautions including that the result of the expression may only be a packed
> field.
>
> The default precision rule is designed to guard against overflow.  Of
> course, we always do that in programming and data base design anyway. <g>
> I've fooled around with the precision stuff some, and have had pretty good
> results with the "r".  Personally, I'd rather that "r" were the default, and
> try to guard against overflow myself.

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