FREXP(3) | Library Functions Manual | FREXP(3) |
frexp
, frexpf
,
frexpl
— convert
floating-point number to fractional and integral components
#include
<math.h>
double
frexp
(double
value, int
*exp);
float
frexpf
(float
value, int
*exp);
long double
frexpl
(long
double value, int
*exp);
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
().
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.
The frexp
() function conforms to
ANSI X3.159-1989
(“ANSI C89”).
June 5, 2013 | OpenBSD-current |