Re: [libertyeiffel] Very strange artihmetic
- From:
- Cyril Adrian
- Date:
- 2011-10-09 @ 08:56
2011/10/9 <christophe.haro@free.fr>
>
> What do you think about these tests ?
>
Nothing unbelievable. 100 is so far below the radar of the large
floating-point number as not to blip a single bit.
Remember that a floating point is above all a mantissa, and fractional part
that represents the most significant part of the number.
The order of magnitude I found that started making any difference for your
operation is 100000000000000000000000000000000.0 (internally,
100000003318135351409612647563264.000000) :-)
As for ~= the magnitude was one zero more!
Floating point should not be used if you need accuracy. That's the rule
number one in banks :-)
Cheers,
*Cyril ADRIAN
**http://www.cadrian.net/cyril*
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