frexp

Syntax

#include <math.h>

double frexp(double x, int *pexp);

Description

This function separates the given value x into a mantissa [0.5,1) and an exponent *pexp, such that m * 2 ^ e = x. As an exception, when x is zero, *pexp and the return value are also both zero.

Return Value

The mantissa.

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