237. Delete Node in a Linked List
Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
Supposed the linked list is 1 -> 2 -> 3 -> 4
and you are given the third node with value 3
, the linked list should become 1 -> 2 -> 4
after calling your function.
题目大意:
给定单链表中的一个节点,删除这个节点。
思路:
由于不能知道这个节点的前一节点,所以可以采用将当前要删除的节点的信息与这一节点的下一节点的信息交换。然后删除下一个节点。这样就实现了删除这个节点。
代码如下:
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/**
* Definition for singly-linked list.
* struct ListNode {
* int val;
* ListNode *next;
* ListNode(int x) : val(x), next(NULL) {}
* };
*/
class
Solution {
public
:
void
deleteNode(ListNode* node) {
if
(NULL == node)
return
;
ListNode * next = node->next;
node->val = next->val;
node->next = next->next;
delete
next;
}
};
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题目不是很好懂。
本文转自313119992 51CTO博客,原文链接:http://blog.51cto.com/qiaopeng688/1837436