# gnc_numeric: fractional displays and rounding

Charles Day cedayiv at gmail.com
Thu Jul 31 20:13:03 EDT 2008

```On Thu, Jul 31, 2008 at 10:19 AM, Charles Day <cedayiv at gmail.com> wrote:

>
>
> On Thu, Jul 31, 2008 at 10:01 AM, Derek Atkins <warlord at mit.edu> wrote:
>
>> Quoting Charles Day <cedayiv at gmail.com>:
>>
>>  Working this way would seem to make little sense. The first three cases
>>> print identically, and the last doesn't work for non-decimal values.
>>> Here's
>>> how I'm guessing it was intended to work:
>>>
>>> round force_fit decimal  non-decimal
>>> ===== ========= ======= =============
>>>    0         0   0.999       0 + 1/3
>>>    1         0   1.000       0 + 1/3
>>>    0         1   0.999         0.999
>>>    1         1   1.000         1.000
>>>
>>> Is this correct? If so, I can readily provide a patch.
>>>
>>
>> I would expect given your inputs that the last two rows in the far
>> right column would both be 0.333
>
>
> Sorry, yes, you're right. Here's a corrected second table:
>
>  round force_fit decimal  non-decimal
>  ===== ========= ======= =============
>      0         0   0.999       0 + 1/3
>      1         0   1.000       0 + 1/3
>      0         1   0.999         0.333 *a better example might be 2/3
> (prints as 0.666)
>      1         1   1.000         0.333 *a better example might be 2/3
> (prints as 0.667)
>

While I'm at it, shall I make 1/3 print simply as "1/3" instead of "0 + 1/3"
in the first two cases?

>
>
>>
>>  Cheers,
>>> Charles
>>>
>>
>> -derek
>>
>> --
>>      Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
>>      Member, MIT Student Information Processing Board  (SIPB)
>>      URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
>>      warlord at MIT.EDU                        PGP key available
>>
>>
>
```