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* [Bug c/63417] New: scanf: problem handling %hhd format
@ 2014-09-30 15:48 subc2 at wp dot pl
2014-09-30 15:51 ` [Bug c/63417] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: subc2 at wp dot pl @ 2014-09-30 15:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63417
Bug ID: 63417
Summary: scanf: problem handling %hhd format
Product: gcc
Version: 4.8.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: subc2 at wp dot pl
The following code runs properly on any UNIX-like operating system, but under
Windows with GCC up to the version 4.8.1 (ports: MinGW, MinGW-w64, TDM-GCC)
gives wrong results.
file.c:
#include <stdio.h>
int main()
{
int logical = 1;
signed char s_char;
scanf("%hhd", &s_char);
if (s_char == 0)
logical = s_char;
printf("%d", logical);
return 0;
}
C:\> gcc -std=gnu99 file.c
C:\> a.exe
0
0
C:\> a.exe
1
0
C:\> a.exe
2
0
What's even more interesting, after compiling this code
magic.c:
#include <stdio.h>
int main()
{
int logical = 1;
signed char s_char;
scanf("%hhd", &s_char);
if (s_char == 0) {
int nothing = 0;
logical = s_char;
}
printf("%d", logical);
return 0;
}
C:\> gcc -std=gnu99 magic.c
C:\> a.exe
0
0
C:\> a.exe
1
1
C:\> a.exe
2
1
everything is OK.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/63417] scanf: problem handling %hhd format
2014-09-30 15:48 [Bug c/63417] New: scanf: problem handling %hhd format subc2 at wp dot pl
@ 2014-09-30 15:51 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2014-09-30 15:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63417
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC does not provide scanf. Most likely MinGW (and maybe even windows)'s scanf
does not provide a POSIX complaint scanf.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2014-09-30 15:51 UTC | newest]
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2014-09-30 15:48 [Bug c/63417] New: scanf: problem handling %hhd format subc2 at wp dot pl
2014-09-30 15:51 ` [Bug c/63417] " pinskia at gcc dot gnu.org
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