() — Motorola System V 88k Release 3.2 Version 1.2C



  FREXP(3C)       (C Programming Language Utilities)      FREXP(3C)



  NAME
       frexp, ldexp, modf - manipulate parts of floating-point
       numbers

  SYNOPSIS
       double frexp (value, eptr)
       double value;
       int *eptr;

       double ldexp (value, exp)
       double value;
       int exp;

       double modf (value, iptr)
       double value, *iptr;

  DESCRIPTION
       Every non-zero number can be written uniquely as x* 2n,
       where the ``mantissa'' (fraction) x is in the range 0.5 <
       |x| < 1.0, and the ``exponent'' n is an integer.  frexp
       returns the mantissa of a double value, and stores the
       exponent indirectly in the location pointed to by eptr.  If
       value is zero, both results returned by frexp are zero.

       Ldexp returns the quantity value* 2exp.

       Modf returns the signed fractional part of value and stores
       the integral part indirectly in the location pointed to by
       iptr.

  DIAGNOSTICS
       If ldexp would cause overflow, +HUGE (defined in <math.h> )
       is returned (according to the sign of value), and errno is
       set to ERANGE.
       If ldexp would cause underflow, zero is returned and errno
       is set to ERANGE.






  Page 1                                                   May 1989
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