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【Q672】什么是原码、补码与反码 #690

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shfshanyue opened this issue Jul 23, 2021 · 1 comment

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shfshanyue commented Jul 23, 2021

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shfshanyue commented Jul 23, 2021 •

edited

原码:
反码: 反码按位取反
补码: 正数和0的补码就是该数字本身，负数的补码则是反码加一

补码

符
0	1	1	1	1	1	1	1	=	127
0	0	0	0	0	0	1	0	=	2
0	0	0	0	0	0	0	1	=	1
0	0	0	0	0	0	0	0	=	0
1	1	1	1	1	1	1	1	=	−1
1	1	1	1	1	1	1	0	=	−2
1	0	0	0	0	0	0	1	=	−127
1	0	0	0	0	0	0	0	=	−128

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