std::scalbn, std::scalbln

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Defined in header `<cmath>`

float scalbn( float x, int exp );		(C++11 feature)

double scalbn( double x, int exp );		(C++11 feature)

long double scalbn( long double x, int exp );		(C++11 feature)

float scalbln( float x, long exp );		(C++11 feature)

double scalbln( double x, long exp );		(C++11 feature)

long double scalbln( long double x, long exp );		(C++11 feature)

Multiplies an floating point value x by FLT_RADIX raised to power exp. On binary system it is equivalent to ldexp()

`arg`	-	floating point value
`exp`	-	integer value

returns x×FLT_RADIX^exp

If the result is too large for the underlying type, range error occurs and HUGE_VAL is returned.

decomposes a number into significand and a power of 2
(function)

multiplies a number by 2 raised to a power
(function)