Hugs is wrong, as you can easily see by evaluating let x = 123.35503 * 10.0 in x == read (show x) With ghc it comes out as True and with Hugs as False.
-- Lennart On Sat, Nov 14, 2009 at 9:00 PM, Abby Henríquez Tejera <parad...@gmail.com> wrote: > Hi. > > I've seen that in GHC sometimes there are little errors in some basic > number calculations: > > *Prelude> 123.35503 * 10.0 > 1233.5502999999999 > > *Prelude> properFraction 123.35503 > (123,0.3550299999999993) > > whereas in Hugs no such errors seem to occur (that I have found, at > least): > > *Hugs> 123.35503 * 10.0 > 1233.5503 > > (but:) > > *Hugs> properFraction 123.35503 > (123,0.355029999999999) > > I understand that error may (and will) happen in floating point, but > it surprises me that they do so easily, and, above all, the difference > between GHC and Hugs. Does someone know why does this difference > occur? > > (Thanks in advance, by the way :) ). > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
