[fpc-pascal] floating point an FPC

[Jerry]

Don't compare floating points. Ever. Now you see why.

Also, don't write loops that calculate a floating point number which  
is then tested for equality to exit the loop. Also, it is a bad idea  
to test for > or < for exiting unless you know in advance an  
accidental equality result will not yield surprising results. In other  
other words, don't do that (test for > or <) either.

Jerry

On Feb 26, 2010, at 3:37 AM, ik wrote:

> Hello,
>
> I've made a small test:
>
> if (0.1+0.2) = 0.3 then
>
> The only compiler/interpator that actually tells that it equal is FPC.
>
> I've tested it using Javascript (in Firefox), Ruby, Python, C (gcc)  
> and Perl.
>
> Except FPC, everyone tells that 0.1+0.2 = 0.30000000000000004
>
> Can someone explain how FPC see the result and why others does not  
> see it like that ?
>
>
> Thanks,
> Ido
>
> http://ik.homelinux.org/
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> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
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