> #define swap(a,b) ((a) = ((b) = ((a) = (a) ^ (b)) ^ (b)) ^ (a))
<1> <2>
I'm surprised that nobody has picked the nit that drew my attention.
This macro requires the first assignment, at <1>, to be completed
before the last (a), at <2>, is evaluated. My reading of K&R says
this cannot be assured. Or did I miss something?
Glen Ecklund