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單項(xiàng)選擇題

假設(shè)容量為(n–1)個(gè)元素的循環(huán)隊(duì)列由能存儲(chǔ)n個(gè)元素的數(shù)組實(shí)現(xiàn)。插入和刪除操作是分別使用REAR和FRONT進(jìn)行操作,初始時(shí)REAR =FRONT =0。判斷隊(duì)列已滿和隊(duì)列已空的條件是()。

A.隊(duì)列滿時(shí):(REAR+1)%n ==FRONT,隊(duì)列空時(shí):REAR ==FRONT
B.隊(duì)列滿時(shí):(REAR+1)%n ==FRONT,隊(duì)列空時(shí):(FRONT+1)%n ==REAR
C.隊(duì)列滿時(shí):REAR ==FRONT,隊(duì)列空時(shí):(REAR+1)%n ==FRONT
D.隊(duì)列滿時(shí):(FRONT+1)%n ==REAR,隊(duì)列空時(shí):REAR ==FRONT

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