Re: Problems with float variables in C

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#519

From: Edward Rosten
Date: Sat, 08 Sep 2001 00:22

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> When checking for possible difficulty with division by zero, if you don't
> wish to get into trapping overflow and the like, you should check at least
> for small non-zero numbers.  If all your numerators have absolute value < 4,
> you could safely do
> #include <float.h>
> if(fabs(y)>FLT_MIN)
>     proceed with division by y
> else
>     treat as error

I'm not trying to be pedantic, I'm genuinely curious, but isn't

fabs(y) > FLT_MIN

equivalent to

f != 0

Since 0 can be represented exactly and FLT_MIN is the smallest
possible float greater than zero?

-Ed

(You can't go wrong with psycho-rats.)      
(u98ejr)(@)(ecs.ox)(.ac.uk)

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