题目
第1题
A.p -> prior –>next= p-> next;p ->next-> prior = p -> prior;
B.p ->prior= p -> prior -> prior;p -> prior ->prior = p;
C.p-> next -> prior = p;p-> next=p-> next-> next;
D.p -> next= p->prior -> prior;p-> prior = p->prior->prior;
第2题
A.p→next→prior=p→prior;p→prior→next=p→next;
B.p→next=p→next→next;p→next→prior=p;
C.p→prior→next=p;p→prior=p→prior→prior;
D.p→prior=p→next→next;p→next=p→prior→prior;
第3题
A.p -> prior = q;q-> next=p;p -> prior ->next=q; q ->prior= p -> prior;
B.q ->prior= p -> prior;p -> prior ->next=q;q-> next=p;p -> prior = q->next;
C.q-> next=p;p -> next=q;q-> prior ->next= q;q-> next=p;
D.p -> prior ->next=q;q-> next=p;q -> prior = p->prior;p -> prior = q;
第4题
A.p -> prior –>next= p-> next;p ->next-> prior = p -> prior;
B.p ->prior= p -> prior -> prior;p -> prior ->prior = p;
C.p-> next -> prior = p;p-> next=p-> next-> next;
D.p -> next= p->prior -> prior;p-> prior = p->prior->prior;
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