Re: [Jscheme-user] Question about exact numbers

[Nathaniel T. <na...@so...>]

Thanks Ken.  I don't know if I will ever get used to (/ 5 2) equaling 2,
though.  Thats what quotient is for!  It may be one of those areas where
java and lisp/scheme are at cultural odds...

-nate

  =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  Nathaniel Titterton                        na...@so...
  CITRIS PostDoc       341 Soda Hall, U.C. Berkeley, Berkeley, CA 94720

On Thu, 30 May 2002, Ken Anderson wrote:

> At 06:40 PM 5/30/2002, Nathaniel Titterton wrote:
>
> >(I've posted this on the open discussion on the sourceforge site, but read
> >that I should try here as well).
> >
> >I was playing with a random number generator, and was surpised to find
> >that in JScheme
> >
> >(/ 1 2)
> >
> >was returning 0. If jscheme doesn't have exact rational numbers (I'm
> >assuming it doesn't), wouldn't it make more sense to return 0.5 instead?
> >An implemenation is free to silently do this, it says in R4RS.
>
> We did this in an earlier version of Jscheme, then called Silk.
> We now adapt Java's arithmetic model so (/ 1 2) is 0
> and (/ 1 2.0) is 0.5.
>
> Section 6.5.3 of R4RS gives some leeway in how numbers are implemented.
>
> >-nate
> >
> >   =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> >   Nathaniel Titterton                        na...@so...
> >   CITRIS PostDoc       341 Soda Hall, U.C. Berkeley, Berkeley, CA 94720
> >
> >
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