Re: why 0.1+0.2-0.3~=0

[Roberto Ierusalimschy <roberto@...>]

> > Is there an easy way to get back the hexa string representation of a
> > given number value ?
> 
> print ( string.format("%.13a", given_number) )
> 
> Note: the ".13" format is only necessary on Microsoft compiler, which
> by default only displays 5 hexadecimal digits.

Which is against the standard:

ISO/IEC 9899:1999 (E), §7.19.6.1

  a, A [...] if the precision is missing and FLT_RADIX is a power of 2,
  then the precision is sufficient for an exact representation of the
  value;

-- Roberto