leetcode Delete Node in a Linked List

题目连接

https://leetcode.com/problems/delete-node-in-a-linked-list/  

Delete Node in a Linked List

Description

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.

/**
 * 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 (!node) return;
		ListNode *x = node->next;
		node->val = x->val;
		node->next = x->next;
		delete x;
	}
};