_fpclass
Returns the status word containing information about the floating-point class.
int _fpclass( double x );
_fpclass returns an integer value that indicates the floating-point class of its argument x. The status word might have one of the following values, defined in Float.h.
|
Value |
Description |
|---|---|
|
_FPCLASS_SNAN |
Signaling NaN |
|
_FPCLASS_QNAN |
Quiet NaN |
|
_FPCLASS_NINF |
Negative infinity ( –INF) |
|
_FPCLASS_NN |
Negative normalized non-zero |
|
_FPCLASS_ND |
Negative denormalized |
|
_FPCLASS_NZ |
Negative zero ( – 0) |
|
_FPCLASS_PZ |
Positive 0 (+0) |
|
_FPCLASS_PD |
Positive denormalized |
|
_FPCLASS_PN |
Positive normalized non-zero |
|
_FPCLASS_PINF |
Positive infinity (+INF) |
|
Function |
Required header |
|---|---|
|
_fpclass |
<float.h> |
For more compatibility information, see Compatibility in the Introduction.
