PE>> {
 PE>> temp = a;
 PE>> a = b;
 PE>> b = temp;
 PE>> }

 FM> Couldn't you avoid using the temporary variable by replacing the above
 FM> with
 FM>      {
 FM>        a ^= b;
 FM>        b ^= a;
 FM>        a ^= b;
 FM>      }

Sure can.  Might get a few remarks about "code readability" though!  :-)

Paul

--- GoldED 2.40