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Well, Gérard, being a software developer by profession, I'd have to tell you that n.d. results lead to "trapping" in a lot of languages. There are some, like ADA, or PLI, where you can handle errors in an "On Error" routine, but usually they tend to make the programs less logical and usable.
It was one of the very first rules that I learned, to prevent a division by 0 beforehand.
I mean, what's the logic behind your question? You can either check for "division by zero" before you make the division, or your can handle the "division by zero" exception afterwards. Where's the big benefit?
IMHO, not checking for div by 0 is sloppy pogramming, and it is totally against the logic of Oberon, where you are expressis verbis told that you should assert all that is necessary for any procedure etc. before you perform it.
René
=============René A. Krywult
-------------------------------------------------
"Gûrberen," pent i naneth dî,
"mabapadan a ce darach sí!"
___________________________________
----- Original von: Gérard Meunier <gemeu{([at]})nowhere.xy
> > This is not the first time that compiler
> 'upgrades' have introduced problems with REAL
> CONSTs.
>
> This is bad for confidence. I think a patch,
> or at least an explanation, would be helpful.
Read on Oms BlackBox page:
> Due to its stability, performance and simplicity, BlackBox is perfectly
suited for science
> and engineering applications.
Well, we all know that, in general, this assertion is true. But it would be
still more true if REALs were bug free.
When a calculation gives an undefined result, such as INF/INF, 0/0 or
INF-INF, the program traps. Is there a way, in this case, to replace the
undefined result by a predefined one and resume calculation without
trapping? And I mean that I'd like to get this behaviour without a plethora
of tests. Any idea? It's called exceptions in other languages.
Gérard
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Received on Tue Sep 14 2004 - 14:29:35 UTC