Bug 92049 - invalid fraction result display
Summary: invalid fraction result display
Status: RESOLVED NOT A BUG
Alias: None
Product: kbruch
Classification: Applications
Component: general (show other bugs)
Version: 0.24
Platform: Compiled Sources Linux
: NOR normal
Target Milestone: ---
Assignee: Sebastian Stein
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2004-10-25 08:38 UTC by Emmanuel Touzery
Modified: 2004-10-26 07:45 UTC (History)
0 users

See Also:
Latest Commit:
Version Fixed In:


Attachments
picture of the error (41.66 KB, image/jpeg)
2004-10-25 08:39 UTC, Emmanuel Touzery
Details

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Description Emmanuel Touzery 2004-10-25 08:38:13 UTC
Version:           3.3 (using KDE KDE 3.3.1)
Installed from:    Compiled From Sources
Compiler:          gcc 3.2.2 mandrake 9.1
OS:                Linux

This is not a crash bug, but when playing with kbruch, I got the following question:
1/5 - 5/2

i entered for a result in the top entry box "-23" and the bottom "10" (-23/10).
The program said it is "correct" and displayed:
1/5-5/2 = -23/10 (what was displayed so far) = -23/10 = -2 * (3/10)

of course, that -23/10 would be equal to -2 * (3/10) is very wrong!
that would really be very confusing for a child who assumes the program is always right to see that...

please see a screenshot at:
http://www.chez.com/powerpeanuts/kbruch-bug.jpg
Comment 1 Emmanuel Touzery 2004-10-25 08:39:51 UTC
Created attachment 8022 [details]
picture of the error

the link i gave checked the referrer it seems, giving sometimes a 403. and an
attachment is more permanent.
Comment 2 Sebastian Stein 2004-10-25 09:33:15 UTC
This is not a bug. The notation means -2 + (3/10). This is a common notation in some countries. The notation is described in the handbook.
Comment 3 Emmanuel Touzery 2004-10-25 09:37:18 UTC
as you wish.. however i would recommend to make it more explicit because at least in france what this means is definitely and unambiguously a multiplication.
and possible confusion is the last thing you want when it comes teaching.
Comment 4 Sebastian Stein 2004-10-25 17:41:27 UTC
Emmanuel Touzery <emmanuel.touzery@wanadoo.fr> [041025 17:27]:
> as you wish.. however i would recommend to make it more explicit because
> at least in france what this means is definitely and unambiguously a
> multiplication.
> and possible confusion is the last thing you want when it comes teaching.

The problem is, that pupils who know this expression will not recognise it,
if I write something like:

2 + 1/10

Maybe there is no way to do it correct for everybody. That's why I
documented it in the handbook.

Sebastian

Comment 5 Emmanuel Touzery 2004-10-26 07:45:25 UTC
I understand. maybe consider a combobox option "fraction display type" "compact" or "expanded" or something, and document it. best would probably be to ask the user at first application startup (alternative is the locale but it will take a long time to collect the whole list, and it's good if user can override it).
i'm just saying, many people probably can't use the app as it is, and it's too bad.