round() function strange behaviour

[Erik de Castro Lopo]

brobbins333 at shaw.ca wrote:
> 
> I understand the problem of rounding errors with binary numbers.
> However, the rounding functions of other languages  work around it and
> return a usable result. What have they got that Python hasn't got?

Possibly other scripting languages have a feature which includes the
current printing representation with the floating point object. This
would however surprise me somewhat.

Have you tried that specific example with other languages? I looked
at Perl and it doesn't have a round function. Apparently the preferred
method in Perl is sprintf ("%.2f", 56.78923) which returns a string
instead of a float.

Once a float is represented as a string you get the behviour you are
after.

> ps -- your name is very familiar. i think i've read one of your books.

I only have one, "SAMs Teach yourself C for Linux Programming in 21 days".
I also have a couple of Free Software packages out there.

Erik
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  Erik de Castro Lopo  nospam at mega-nerd.com (Yes it's valid)
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