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
     If the result of ldexp could cause an overflow or underflow
     then errno is set to ERANGE. HUGE or -HUGE is returned on
     overflow depending on the sign of value and 0 is returned on
     underflow.


SEE ALSO
     intro(3f).






















Printed 10/17/86                                                1

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