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#include <math.h> |
The macro fpclassify returns the kind of the floating point
value supplied.
FP_INFINITE, FP_NAN, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO or FP_UNNORMAL.
| ANSI/ISO C | C99; not C89 |
float f = 1;
double d = INFINITY;
long double ld = NAN;
if( fpclassify(f) != FP_NORMAL )
{
printf("Something is wrong with the implementation!\n");
}
if( fpclassify(d) != FP_INFINITE )
{
printf("Something is wrong with the implementation!\n");
}
if( fpclassify(ld) != FP_NAN )
{
printf("Something is wrong with the implementation!\n");
}
|