Integer division

[Bill Wyatt]

>  [ .... ]             In C on UNIX, for example, one has
> log(-x) == log(x), a rather dangerous identity, not based on anything
> comprehensible.  Thus, the implementation of general exponentiation,
> a**b = pow(a,b) = exp( b*log(a) ) will silently return the wrong value
> if a is negative.  (Try taking cube roots this way!)]
> 
> ucbvax!brahms!weemba	Matthew P Wiener/UCB Math Dept/Berkeley CA 94720

I did the above example (uVax II, Ultrix 1.1) and got a `floating exception'.
AHA, I thought , DEC cleaned up this bogosityr! Then I decided to simply
print log(-4.0), and it happily printed a garbage number!

It would seem that the exception was only because the exp function was 
delivered a large number.
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