NAME    [Toc]    [Back]

     frexp - convert floating-point number to fractional and  integral components

SYNOPSIS    [Toc]    [Back]

     #include <math.h>

     double
     frexp(double value, int *exp);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     ldexp(3), math(3), modf(3)

STANDARDS    [Toc]    [Back]

     The frexp() function conforms to  ANSI  X3.159-1989  (``ANSI
C'').

OpenBSD      3.6                           June      4,      1993