🚀 go-pugleaf

In article <226@cogent.UUCP>, mark@cogent.UUCP (Captain Neptune) writes:
> 
> I am running an HP 9000/840 running HP-UX and I have a problem doing some math.
> I am trying to use pow(3M) to raise a positive integer value to a negative
> integer value.  For example, the 12th root of 2 --> 2 ^ (-12) --> pow(2,-12).
> 
> I keep getting "DOMAIN error" even though the manual page doesn't seem to
> cite this case as an illegal one.  It would be illegal if, say, the first
> argument was zero, for instance.  Pow(3M) is found on the manual page for
> "exp(3M)".

My guess is that you have neglected ensure that the arguments passed to pow
are doubles. try pow(2.0, -12.0);
BTW the 12th root of 2 is 2^(1/12) i.e. pow(2.0, 1.0/12.0);

V7 and BSD man page say that pow gives domain error when 2nd argument
is negative and non-integral. This is wrong. SYSV man page correctly
states that domain error results when 1st arg is negative and 2nd is
non-integral.

-- 
     ll  // // ,~/~~\'   T. J. Thompson {decvax,ihnp4,seismo}!watmath!mks!tj
    /ll/// //l' `\\\     Mortice Kern Systems Inc.
   / l //_// ll\___/     43 Bridgeport Rd. E., Waterloo, ON, Can. N2J 2J4
O_/                      (519)884-2251