Extracts exponential value of double-precision floating-point argument.
double _logb( double x );
|_logb||<float.h>||Win 95, Win NT|
For additional compatibility information, see Compatibility in the Introduction.
|LIBC.LIB||Single thread static library, retail version|
|LIBCMT.LIB||Multithread static library, retail version|
|MSVCRT.LIB||Import library for MSVCRT.DLL, retail version|
_logb returns the unbiased exponential value of x.
Double-precision floating-point value
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.
See Also frexp