[Bug-apl] Integer - rational multiplication anomaly

Juergen Sauermann

2017-08-16 11:53:37 UTC

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Hi Frederick, 
 
thanks, fixed in SVN 996. 
 
/// Jürgen 
 
 
<div class="moz-cite-prefix">On 08/16/2017 06:55 AM, Frederick Pitts
wrote: 
</div>
<blockquote cite="mid:***@comcast.net"
type="cite">
<pre wrap="">Hello all,

With gnu-apl configured with RATIONAL_NUMBERS_WANTED=YES, I
observe the following:

⎕PS ← 1 22
x ← 3 ÷ 1
x + 1 ÷ 2
╔═══╗
║7÷2║
╚═══╝
x × 1 ÷ 2
╔═══╗
║1.5║
╚═══╝

The last result should be 3÷2. In general, multiplication of
integers and rationals should yield rationals or integers (which are
rationals with a denominator of 1), not floats. The exception would be
when the numerator or denominator of an intermediate rational result
overflows the integer range.

Regards,

Fred

</pre>
</blockquote>
 
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