LeetCode237. Delete Node in a Linked List

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题目:

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 -> 4after calling your function.

题解:

  无法获得目标节点的上一节点,只能复制下一节点,然后删除掉

Solution 1 ()

class Solution {
public:
    void deleteNode(ListNode* node) {
        ListNode *p = node->next;
        node->val = p->val;
        node->next = p->next;
        delete p;   
    }
};

   还有结构体赋值操作(我是这么理解的) *node = *node->next 等价于node->val = node->next->val;node->next = node->next->next;

Solution 2 ()

class Solution {
public:
    void deleteNode(ListNode* node) {
        auto next = node->next;
        *node = *next;
        delete next;  
    }
};

 

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