| Author |
Invalid Operator to binary *
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| I am getting this error for both "*" and "/"..
Here is the code from where it is coming...
----------------
#ifdef LINUX_OS
if (_TICKSPERSEC < 1000)
time_elapsed = (time_elapsed * (1000 / _TICKSPERSEC));
else
time_elapsed = (time_elapsed /(_TICKSPERSEC / 1000));
#else
#if (_TICKSPERSEC < 1000)
time_elapsed = (time_elapsed * (1000 / _TICKSPERSEC));
#else
time_elapsed = (time_elapsed /(_TICKSPERSEC / 1000));
#endif
#endif
----------------
_TICKSPERSEC is defined as "sysconf(_SC_CLK_TCK)" and time_elapsed is
defined as "unsigned long"
I also try modefying it to "*= " and "/="... but it still is giving me
same error.....
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| Paul D. Smith 2006-07-27, 1:27 pm |
| %% "Mihir" <patel.ma@gmail.com> writes:
m> I am getting this error for both "*" and "/"..
m> #if (_TICKSPERSEC < 1000)
m> _TICKSPERSEC is defined as "sysconf(_SC_CLK_TCK)"
The preprocessor needs to evaluate its arguments at compile time, so
all parts of an expression must be constant. sysconf() is a runtime
function call, so you can't use it in a preprocessor statement.
--
-------------------------------------------------------------------------------
Paul D. Smith <psmith@nortel.com> HASMAT--HA Software Mthds & Tools
"Please remain calm...I may be mad, but I am a professional." --Mad Scientist
-------------------------------------------------------------------------------
These are my opinions--Nortel takes no responsibility for them.
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|
| 1 >> #ifdef LINUX_OS
2 >> if (_TICKSPERSEC < 1000)
3 >> time_elapsed = (time_elapsed * (1000 / _TICKSPERSEC));
4 >> else
5 >> time_elapsed = (time_elapsed /(_TICKSPERSEC / 1000));[vbcol=seagreen]
On this block i am getting error on 3rd line and 5th line.
The exact error massege is "error: invalid operation to binary *" and
also for the 5th line
"error: invalid operation to binary /"
I have unistd.h included here. And I defined _TICKSPERSEC as
#define _TICKSPERSEC sysconf(_SC_CLK_TCK)
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| Eric Sosman 2006-07-27, 7:24 pm |
|
Mihir wrote On 07/27/06 14:23,:
> 1 >> #ifdef LINUX_OS
> 2 >> if (_TICKSPERSEC < 1000)
> 3 >> time_elapsed = (time_elapsed * (1000 / _TICKSPERSEC));
> 4 >> else
> 5 >> time_elapsed = (time_elapsed /(_TICKSPERSEC / 1000));
>
> On this block i am getting error on 3rd line and 5th line.
This isn't the same code you posted in the first message.
Let me make a suggestion: Instead of posting approximations
plus explanations, try to construct a short, complete program
that demonstrates the problem -- fifteen or twenty lines ought
to do it, I'd think. The post that entire chunk of code EXACTLY
as it stands: cut and paste, don't re-type. That way, we'll
be debugging the actual code and not a series of approximations.
> The exact error massege is "error: invalid operation to binary *" and
> also for the 5th line
> "error: invalid operation to binary /"
Are these the EXACT error messages? I doubt it ... Again,
learn to cut and paste so as to avoid introducing inaccuracies.
--
Eric.Sosman@sun.com
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| Bjorn Reese 2006-07-28, 7:27 am |
| Mihir wrote:
> 1 >> #ifdef LINUX_OS
> 2 >> if (_TICKSPERSEC < 1000)
> 3 >> time_elapsed = (time_elapsed * (1000 / _TICKSPERSEC));
> 4 >> else
> 5 >> time_elapsed = (time_elapsed /(_TICKSPERSEC / 1000));
>
> On this block i am getting error on 3rd line and 5th line.
>
> The exact error massege is "error: invalid operation to binary *" and
> also for the 5th line
> "error: invalid operation to binary /"
>
> I have unistd.h included here. And I defined _TICKSPERSEC as
> #define _TICKSPERSEC sysconf(_SC_CLK_TCK)
I cannot reproduce your problem:
[breese@stellifer:/home/breese/junk] cat ticspersec.c
#include <unistd.h>
#define _TICKSPERSEC sysconf(_SC_CLK_TCK)
int main(void)
{
unsigned long time_elapsed;
if (_TICKSPERSEC < 1000)
time_elapsed = (time_elapsed * (1000 / _TICKSPERSEC));
else
time_elapsed = (time_elapsed /(_TICKSPERSEC / 1000));
return 0;
}
[breese@stellifer:/home/breese/junk] gcc -Wall ticspersec.c
[breese@stellifer:/home/breese/junk]
As Eric said, please provide us with an exact example that fails.
--
mail1dotstofanetdotdk
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