FREXP(3C)               COMMAND REFERENCE               FREXP(3C)



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 a double value as a double
     quantity, x, of magnitude less than 1 and stores an integer
     n such that value = x*2n indirectly through eptr.

     Ldexp returns the quantity value*2exp.

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

DIAGNOSTICS
     Ldexp is undefined when the correct value would overflow;
     errno is set to ERANGE.

SEE ALSO
     intro(3f) and ieee(3m).

























Printed 3/13/89                                                 1

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