NAME
frexp, frexpf,
frexpl —
convert floating-point number to
fractional and integral components
SYNOPSIS
#include
<math.h>
double
frexp(double
value, int
*exp);
float
frexpf(float
value, int
*exp);
long double
frexpl(long
double value, int
*exp);
DESCRIPTION
The
frexp()
function breaks a floating-point number into a normalized fraction and an
integral power of 2. It stores the integer in the
int object pointed to by exp.
The
frexpf()
function is a single precision version of frexp().
The
frexpl()
function is an extended precision version of
frexp().
RETURN VALUES
The frexp(),
frexpf() and frexpl()
functions return the value x, such that
x is a double with magnitude
in the interval [1/2, 1) or zero, and value
equals x times 2 raised to the power
*exp. If value is zero, both
parts of the result are zero.
SEE ALSO
STANDARDS
The frexp() function conforms to
ANSI X3.159-1989
(“ANSI C89”).