题目内容
(请给出正确答案)
[单选题]
执行出栈指令POP时,栈顶指针SP为:()。
A.SP←SP+1
B.SP←SP-1
C.SP←SP+2
D.SP←SP-2
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A.SP←SP+1
B.SP←SP-1
C.SP←SP+2
D.SP←SP-2
A.(MSP)→A.(SP)+1→SP
B.(SP)+1→SP.(MSP)→A
C.(SP-1)→SP.(MSP)→A
D.(MSP)→A.(SP)-1→SP
A.5,4,3,2,1,6
B.2,3,5,6,1,4
C.3,2,5,4,1,6
D.1,4,6,5,2,3
A.5,6,4,2,3,1
B.3,4,2,1,6,5
C.3,2,6,1,4,5
D.1,2,5,3,4,6