题目内容

设链队列Q的头指针和尾指针分别为front和rear,初始时队列为空,若向队列插入一个元素*s,则应执行的指针操作为( )。

A. Q->front->next=s;s->next=Q->rear;Q->rear=NULL;
B. s->next=Q->front;Q->rear->next=s;Q->rear=NULL;
C. Q->rear->next=s;Q->rear=s;s->next=NULL;
D. Q->front->next=s;Q->rear=s;s->next=NULL;

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