Re: [Jscheme-user] Question about exact numbers

[Ken A. <kan...@bb...>]

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
>
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>   Nathaniel Titterton                        na...@so...
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