How to get the limit on it's range of the double type?

[Viery]

Hi,
I want to write some codes to get the limit of range in real
number.
Could you please give me some sample? Because I am not familiar
with C language.

Thanks,
Viery

 

[Emmanuel Delahaye]

I want to write some codes to get the limit of range in real
number.
Could you please give me some sample? Because I am not familiar
with C language.

The values are defined by macros belonging to <float.h>

 

[Malcolm]

Hi,
I want to write some codes to get the limit of range in real
number.
Could you please give me some sample?

#include <float.h>
#include <stdio.h>

int main(void)
{
printf("Biggest double %g\n", DBL_MAX);
printf("Smallest fraction %g\n", DBL_MIN);
printf("Decimal precison %d digits\n", (int) DBL_DIG);
return 0;
}

 

[Joe Wright]

#include <float.h>
#include <stdio.h>

int main(void)
{
printf("Biggest double %g\n", DBL_MAX);
printf("Smallest fraction %g\n", DBL_MIN);
printf("Decimal precison %d digits\n", (int) DBL_DIG);
return 0;
}

Why the cast? DBL_DIG is int.