单选

●设机器码的长度为8位，已知x，z为带符号纯整数，y为带符号纯小数，［X］原=［Y］补=［Z］移=11111111，求出x、y、z的十进制真值：X= (11) Y= (12) ，Z= (13) 。
(11)

A．127 &n
bsp; B．-1
C．-127
D．1 (12) A．1／128
B．-1／128
C．127／128
D．-127／128 (13) A．-1
B．127
C．-127
D．1

试题出自试卷《2011年程序员考试考前密卷（六）-上午试题》

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●设机器码的长度为8位，已知x，z为带符号纯整数，y为带符号纯小数，［X］原=［Y］补=［Z］移=11111111，求出x、y、z的十进制真值：X= (11) Y= (12) ，Z= (13) 。(11)

●设机器码的长度为8位，已知x，z为带符号纯整数，y为带符号纯小数，［X］原=［Y］补=［Z］移=11111111，求出x、y、z的十进制真值：X= (11) Y= (12) ，Z= (13) 。
(11)