Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Returns the status word containing information about the floating-point class.
int _fpclass(
double x
);
Parameters
- x
Double-precision floating-point value.
Return Value
_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) |
Requirements
Function |
Required header |
|---|---|
_fpclass |
<float.h> |
For more compatibility information, see Compatibility in the Introduction.