std::frexp

 

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abs(int) labs llabs imaxabs (C++11) abs(float) fabs div ldiv lldiv imaxdiv (C++11) fmod	remainder (C++11) remquo (C++11) fma (C++11) fmax (C++11) fmin (C++11) fdim (C++11) nan nanf nanl (C++11) (C++11) (C++11)
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ldexp scalbn scalbln (C++11) (C++11) ilogb (C++11) logb (C++11)	frexp modf nextafter nexttoward (C++11) (C++11) copysign (C++11)
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Defined in header <cmath>
float       frexp( float arg, int* exp );
double      frexp( double arg, int* exp );
long double frexp( long double arg, int* exp );
double      frexp( Integral arg, int* exp );		(since C++11)

Decomposes given floating point value to significand and exponent.

Parameters

arg	-	floating point value
exp	-	pointer to integer value to store the exponent to

Return value

significand of the given floating point number in the range of [0.5; 1). The exponent is put into integer value pointed to by exp.

See also

ldexp	multiplies a number by 2 raised to a power (function)
logb (C++11)	extracts exponent of the number (function)
ilogb (C++11)	extracts exponent of the number (function)
modf	decomposes a number into integer and fractional parts (function)