Re: inconsistent float behaviour
Re: inconsistent float behaviour
- Subject: Re: inconsistent float behaviour
- From: ghe <email@hidden>
- Date: Fri, 10 Oct 2008 11:29:50 -0600
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Nick Zitzmann wrote:
>
> On Oct 10, 2008, at 5:04 AM, Steven Hamilton wrote:
>
>> Am I totally misunderstanding something about floats? Or is the extra
>> ##'s in the formatter making things up?
>
>
> Floating point values of either float or double are not guaranteed to be
> super precise, and should never be used to represent currency values.
> Try using a long long instead, and have the first two digits represent a
> fractional unit of currency.
Keep in mind that despite the decimal point (US $$), money is an
integer. If you're using a 64 bit int, there's room to shift it over 8
bits or so to give a little roundoff space for division and percents and
the like.
Unless you're working with your losses in the stock market (Oct 2008)...
- --
Glenn English
email@hidden
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