frexp

FREXP(3)                   Linux Programmer's Manual                  FREXP(3)



NAME
       frexp - convert floating-point number to fractional and integral compo-
       nents

SYNOPSIS
       #include <math.h>

       double frexp(double x, int *exp);

DESCRIPTION
       The frexp() function is used to split the number x  into  a  normalized
       fraction and an exponent which is stored in exp.

RETURN VALUE
       The  frexp() function returns the normalized fraction.  If the argument
       x is not zero, the normalized fraction is x times a power of  two,  and
       is always in the range 1/2 (inclusive) to 1 (exclusive).  If x is zero,
       then the normalized fraction is zero and zero is stored in exp.

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       ldexp(3), modf(3)



GNU                               1993-06-06                          FREXP(3)