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.

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这个题很基础了，将需要删除的节点传入，只需要将后一个节点的内容赋值到当前节点并且删除点后一个节点即可。

#include <iostream>using namespace std;struct ListNode {    int val;    ListNode *next;    ListNode(int x) : val(x), next(NULL) {}};class Solution {public:    void deleteNode(ListNode* node) {        if(node->next) {            node->val = node->next->val;            node->next = node->next->next;        }    }};int main() {    Solution s;    ListNode node1(1);    ListNode node2(2);    ListNode node3(3);    ListNode node4(4);    node1.next = &node2;    node2.next = &node3;    node3.next = &node4;    s.deleteNode(&node3);}