双链表的插入和删除的伪代码
时间: 2023-06-12 07:04:27 浏览: 45
双链表的插入和删除操作的伪代码如下:
插入操作:
```
// 在双链表的指定位置插入一个新节点
insert(node, position):
if position == 0:
// 在链表头插入新节点
node.next = head
head.prev = node
head = node
else:
// 找到指定位置的节点
prev_node = head
for i in range(position - 1):
prev_node = prev_node.next
// 插入新节点
node.prev = prev_node
node.next = prev_node.next
prev_node.next.prev = node
prev_node.next = node
```
删除操作:
```
// 从双链表中删除指定位置的节点
delete(position):
if position == 0:
// 删除链表头
head = head.next
head.prev = None
else:
// 找到指定位置的节点
node_to_delete = head
for i in range(position):
node_to_delete = node_to_delete.next
// 删除节点
node_to_delete.prev.next = node_to_delete.next
if node_to_delete.next != None:
node_to_delete.next.prev = node_to_delete.prev
```