FREXP(3) BSD Library Functions Manual FREXP(3)
NAME
frexp -- convert floating-point number to fractional and integral components
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h>
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) 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'').
BSD
March 21, 2006 BSD
