Extracts exponential value of double-precision floating-point argument.
double _logb( double x );
- Double-precision floating-point value.
_logb returns the unbiased exponential value of x.
The _logb function extracts the exponential value of its double-precision floating-point argument x, as though x were represented with infinite range. If the argument x is denormalized, it is treated as if it were normalized.
|Input||SEH Exception||Matherr Exception|
|_logb||<float.h>||Win 98, Win Me, Win NT, Win 2000, Win XP|
For additional compatibility information, see Compatibility in the Introduction.
All versions of the C run-time libraries.