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.
Besides vomiting, signs of stomach upset in cats include discomfort in the abdomen, depression, hiding or retching. Stomach upset/vomiting is among the top five conditions for which insurance claims are filed for cats (VPI, 2013). Many cats seem to vomit or go off their food for no apparent reason. But stomach upset is a sort of catchall symptom for the myriad potential causes of vomiting or loss of appetite in cats.