FREXP(3)                                                 FREXP(3)

     NAME
          frexp, ldexp, modf - split into mantissa and exponent

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

          double ldexp(value, exp)
          double value;

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

     DESCRIPTION
          Frexp returns the mantissa of value and stores the exponent
          indirectly through eptr, so that value =
          frexp(value)*2**(*eptr).

          Ldexp returns the quantity value*2**exp.

          Modf returns the positive fractional part of value and
          stores the integer part indirectly through iptr.