-0.00

-0.00

[Mohammad Hossein Bateni]

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Hi,
 I have compiled the "test.c" program using command line:
   gcc test.c
 it writes:  -0.00 instead of 0.00
thank you

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#include <stdio.h>

int main() {
  double a = -0.0001;
  printf("%0.02lf\n", a);
  return 0;
}

Re: -0.00

[Jim Wilson]

Mohammad Hossein Bateni wrote:
>  it writes:  -0.00 instead of 0.00
>   double a = -0.0001;
>   printf("%0.02lf\n", a);

See http://gcc.gnu.org/bugs.html for info on reporting bugs.

This is a C library issue, not a compiler issue.  Since you gave no info 
about the target, I can not comment further.  You could try reporting 
this to whoever maintains the C library you are using.  However, the 
behaviour seems reasonable to me.  printf doesn't do any arithmetic on 
the value, it just prints how many digits you asked for.  The value is 
negative, and you only asked for two sigificant digits, so -0.00 is what 
you get.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com