Two's complement is a clever way of storing integers so that common math problems are very simple to implement. To understand, you have to think of the numbers in binary. It basically says, 1  for zero, use all 0's. 2  for positive integers, start counting up, with a maximum of 2 (number of bits - 1) -1.or example: 100101 itâs 1âs complement is 011010 and 2âs complement is 011010+1 = 011011 (By adding one with 1's complement) For more information this article explain it graphically.
If your cat is throwing up white foam and making noticeable hacking sounds, then it could be a precursor to actually producing the mass of hair -- the hairball. If the mass forms a plug, it may strain liquid out that appears as foam. Other common indications of hairballs are constipation and reduced appetite.
1 Safety. 2  If a cat doesnât want to stick his head in the water bowl because it limits his vision or he feels unsafe or uncomfortable, he may spill the water out of the bowl so he can lick the liquid from the floor.3  This could happen if the bowl is too deep, too small, too big or just located in an unappealing place. That behavior can become a habit and then morph into enthusiastic play behavior. 2  Reflections. 3  Cats may see their reflection or some sparkle of light coming off the waterâs surface and they bat at it, which, depending on how enthusiastic they are, can result in spilled water or an overturned bowl. 4  Safety.