Re: Floating-Point
Hello Robert,
Thanks for the info. I understand the problem very well now.
>1. floating-point calculations are not always exact, and a tiny
> error in a calculation can be magnified into a huge error.
> floor(0.99999) is 0, as is floor(0.9999999999... trillion places)
> It is your responsibility as a programmer to properly handle
> these situations.
I for one would almost rather recieve an error or a warning
than allow subscripts be non-integers. Or perhaps the
subscript error could have showed the original value instead
of the floored result. This would help me to "properly handle
these situations" by letting me know when they occur. Are
you suggesting that we round everything to make sure this
doesn't sneak up on us.
>5. By default, Euphoria prints numbers rounded to 10
> significant digits. This is an arbitrary cutoff point that was
> chosen so as to not cause undue eyestrain or clutter.
> If you want to see more digits, use printf(1, "%.16e", x).
My main confusion was that when I print()ed the results of
the expressions it said 1 instead of .9999999999. Is that
because of the 10 digit cutoff? Sure, I know, I didn't use
printf() to get lots of decimal places but print() ROUNDED UP
(to the nearest integer)! If print can do this, why can't the
subscript mechanism? Would it slow things down?
Sorry if this sounds like I'm whining. I'm just looking for
more information.
later,
Lewis Townsend
keroltarr at hotmail.com
http://geocities.com/keroltarr/
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