已知循環(huán)隊(duì)列Q->element[MAXSIZE],隊(duì)頭指示器為Q->front,隊(duì)尾指示器為Q->rear(指向真實(shí)隊(duì)尾的下一個(gè)位置)。
A.Q->rear==Q->frontB.Q->rear+1==Q->frontC.(Q->rear+1)%MAXSIZE==Q->frontD.(Q->rear-1)%MAXSIZE==Q->front
A.Q->rear-Q->frontB.Q->rear-Q->front+1C.(Q->rear-Q->front+MAXSIZE)%MAXSIZED.(Q->rear-Q->front+1+MAXSIZE)%MAXSIZE
A.*x=Q->next->dataB.*x=Q->front->dataC.*x=Q->front->next->dataD.*x=Q->rear->data