Re: other/5752: Zeros not displayed as significant figures

Re: other/5752: Zeros not displayed as significant figures

[jakub]

Synopsis: Zeros not displayed as significant figures

State-Changed-From-To: open->closed
State-Changed-By: jakub
State-Changed-When: Fri Feb 22 13:31:54 2002
State-Changed-Why:
    This has nothing to do with gcc, printf is in libc.
    But glibc does the right thing, just read some standard
    covering printf (be it ISO C99 or Unix98).
    E.g. http://www.opengroup.org/onlinepubs/007908799/xsh/fprintf.html
    sais about %g:
    Trailing zeros are removed from the fractional portion of the result; a radix character appears only if it is followed by a digit.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5752

other/5752: Zeros not displayed as significant figures

[warren]

>Number:         5752
>Category:       other
>Synopsis:       Zeros not displayed as significant figures
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          mistaken
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 22 08:26:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Warren du Plessis
>Release:        1.0
>Organization:
>Environment:
Linux Mandrake 8 and 8.1
Kernel 2.4.6-26mdk - but other versions of the kernel give the same results.
gcc version 2.96 (Linux-Mandrake 8.0 2.96-0.48mdk) and 3.0
>Description:
The %g output format specifier does not display zeros as significant figures.  This is not correct because a zero is generally displayed if it is accurate.  For example a value of 1 should be displayed as '1.0' to two significant figures (%.2g) because the zero is accurate, but it displays it as '1'.  The %f output format specifier does not have this problem and displays zeros as necessary (1 will display as 1.0 under %.1f).
>How-To-Repeat:
Compile the sample program and run it!
I used 'gcc -o test test.c' to compile it.
>Fix:
Don't know... I was hoping some kind soul out there would help.
>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="test.c"

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