完成在双循环链表结点p之后插入s的操作为: The operation to insert s after the doubly circular linked list’s node p is: (There are more than one answers.)
A.p->next->prev=s; s->prev=p; s->next=p->next; p->next=s;
B.p->next->prev=s; p->next=s; s->prev=p; s->next=p->next;
C.s->prev=p; s->next=p->next; p->next=s; p->next->prev=s;
D.s->next=p->next; p->next->prev=s; s->prev=p; p->next=s;