_fpclass
Visual Studio 2010
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.
