GNU bug report logs -
#30453
Bug in BC calculator version 1.07.1
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Reported by: Thomas Bracken <t.bracken <at> shaw.ca>
Date: Wed, 14 Feb 2018 07:27:02 UTC
Severity: normal
Tags: notabug
Done: Assaf Gordon <assafgordon <at> gmail.com>
Bug is archived. No further changes may be made.
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(Wed, 14 Feb 2018 07:27:02 GMT)
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
[Message part 1 (text/plain, inline)]
Hello,
Your BC calculator does not do any truncation for the scale value
when it does a multiplication. See example below.
It works fine on division, but not on multiplication.
Cheers!
Tom Bracken
[thomas <at> HP6005computer1 ~]$ bc
bc 1.07.1
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free
Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
scale = 5
56.4325435 / 6.3408340583467346436
8.89986
56.4325435 * 6.3408340583467346436
357.82939_38239336408579_
56.4325435 * 6.3408340583467346436 / 1
357.82939
quit
[thomas <at> HP6005computer1 ~]$
--
[Message part 2 (text/html, inline)]
[Thomas.jpg (image/jpeg, inline)]
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bug#30453
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(Wed, 14 Feb 2018 22:51:01 GMT)
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Message #8 received at 30453 <at> debbugs.gnu.org (full text, mbox):
This is not a bug.
From the man-page:
$ man bc | fgrep -A5 "expr * expr"
expr * expr
The result of the expression is the product of the two
expressions.
expr / expr
The result of the expression is the quotient of
the two expressions. The scale of the result is the value of the
variable
scale.
So expr * expr is not scaled but expr / expr is scaled.
Regards
Martin
On 14 February 2018 at 07:52, Thomas Bracken <t.bracken <at> shaw.ca> wrote:
> Hello,
>
> Your BC calculator does not do any truncation for the scale value
>
> when it does a multiplication. See example below.
>
> It works fine on division, but not on multiplication.
>
This is not a bug.
From the man-page:
$ man bc | fgrep -A5 "expr * expr"
expr * expr
The result of the expression is the product of the two
expressions.
expr / expr
The result of the expression is the quotient of
the two expressions. The scale of the result is the value of the
variable
scale.
Regards
Martin
Information forwarded
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bug#30453
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(Tue, 30 Oct 2018 02:47:02 GMT)
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Message #11 received at 30453 <at> debbugs.gnu.org (full text, mbox):
tags 30453 notabug
close 30453
stop
(triaging old bugs)
On 2018-02-14 3:33 p.m., Martin Møller Skarbiniks Pedersen wrote:
> This is not a bug.
> From the man-page:
>
> $ man bc | fgrep -A5 "expr * expr"
> expr * expr
> The result of the expression is the product of the two
> expressions.
>
> expr / expr
> The result of the expression is the quotient of
> the two expressions. The scale of the result is the value of the
> variable
> scale.
as bc(1) is not part of GNU coreutils,
I'm closing this bug.
-assaf
Added tag(s) notabug.
Request was from
Assaf Gordon <assafgordon <at> gmail.com>
to
control <at> debbugs.gnu.org
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(Tue, 30 Oct 2018 02:47:02 GMT)
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bug closed, send any further explanations to
30453 <at> debbugs.gnu.org and Thomas Bracken <t.bracken <at> shaw.ca>
Request was from
Assaf Gordon <assafgordon <at> gmail.com>
to
control <at> debbugs.gnu.org
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(Tue, 30 Oct 2018 02:47:02 GMT)
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bug archived.
Request was from
Debbugs Internal Request <help-debbugs <at> gnu.org>
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internal_control <at> debbugs.gnu.org
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(Tue, 27 Nov 2018 12:24:09 GMT)
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This bug report was last modified 5 years and 123 days ago.
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