设机器字长为8个二进制位，对于十进制数-128，其补码表示为（ ）。
- A.1111 1111
- B.1111 0000
- C.1000 0000
- D.1000 1000
正确答案及解析
正确答案
C
解析
补码可以表示-128~127之间的数值，其中人为规定将-128的补码表示为1000 0000。
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