It should be noted that: [- y] complement = [y] complement [- y] complement = [y] complement includes sign bit inversion and last bit plus 1. The inversion here includes the symbol bit, which is different from the symbol bit inversion code.<br>In addition and subtraction operation of complement, we need to pay attention to the overflow of complement. In fixed-point integer machine, the representation range of number is|x|<br>
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