frexp.c File Reference

#include "../math.h"

Functions
double	frexp (double x, int *exp)
	Get significand and exponent. More...

Function Documentation

frexp()

double frexp	(	double	x,
		int *	exp
	)

Get significand and exponent.

The frexp functions break a floating-point number into a normalized fraction and an integral power of 2. They store the integer in the int object pointed to by exp.

Parameters

x	Value to be decomposed.
exp	Pointer to an int where the value of the exponent is stored.

Returns

If value is not a floating-point number or if the integral power of 2 is outside the range of int, the results are unspecified. Otherwise, the frexp functions return the value x, such that x has a magnitude in the interval [1/2, 1) or zero, and value equals x × 2^exp. If value is zero, both parts of the result are zero.