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【Q672】什么是原码、补码与反码
#690
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shfshanyue
opened
3 years ago
shfshanyue
commented
3 years ago
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
补码