循环队列是空队列的条件是（）。A.Q - > rear = = Q - > f

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问题循环队列是空队列的条件是（）。A.Q - > rear = = Q - > front B.（Q - > rear + 1）%maxsize = = Q - > front C.Q - > rear = = 0 D.Q - > front = = 0

选项 A.Q - > rear = = Q - > front
B.（Q - > rear + 1）%maxsize = = Q - > front
C.Q - > rear = = 0
D.Q - > front = = 0

答案 A

解析如果循环队列的头指针与尾指针相等，代表该队列为空。（Q- > rear + 1）%maxsize = = Q - > front 则是判断队满的标识。

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