There seems to be no difference between +0 and -0 in the computer. Take an 8-bit computer as an example: if there is a difference between positive zero and negative zero, the length of one bit of the computer can only represent-127 ~+ 127 * * 255, but if we judge/kloc -0/000,000 as-0, we can represent one more number. In order to be more powerful, the designer asked the computer not to distinguish between +0 and -0, so there is no such thing as -0, so the complement of 0 is unique, that is, the complement of +0.