NAME
frexp
- convert floating-point number to fractional and integral components
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
double
frexp(double value, int *exp)
float
frexpf(float 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.
RETURN VALUES
The
frexp()
function returns the value
x,
such that
x
is a
double
with magnitude in the interval
1/2, 1(.blm Pp)
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
ldexp(3),
math(3),
modf(3)
STANDARDS
The
frexp()
function conforms to
ANSI X3.159-1989 (``ANSI C89'') .