一个循环队列Q的存储空间大小为M,其队头和队尾指针分别为front和rear，则循环队列中元素的个数为： 。
((font+rear)-m)%m
(Q.rear-Q.front+M)%M
(rear-front+M)%M
M-1
答案：M-
(rear-front+m)%m
(rear-front+m)％m
（rear-front+． m）% m
(rear - front +M)%M
(rear - front + M)%M
(rear-front+M)/%M
3
(Q.rear-Q.front+Maxsize)%Maxsize
（rear+m-front）%m
（rear-front+M）%M
(reae-front+MAXSIZE)%MAXSIZE
(rear - front + M) % M
(rear-fornt+M)%M
(front-rear+M)%M
(rear－front+M)%M
（rear-front➕M）%M
size = (rear-front+m)%m；
r-f+m)%m
(read - front + M) % M
（rear-front+m）%m
（front-rear+M）%M
若水一直动情 回复 若水一直动情： （rear-front+M）%M
（rear-front+m)%m
(rear+M-front)%M
(rear - front + m) % m
答案：(rear-front+M)...
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答案：(rear-front+M)%M
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