代码随想录:移除链表元素
简单的链表操作,注意C++中在访问一个实体结构体时,用.来进行元素访问
ListNode head;
head.val = 10;
head.next = nullptr;
在访问一个指针变量时,用→来进行元素访问,如在本题中,题目给的head是一个指针,所以所有的变量访问都用→
/*** Definition for singly-linked list.* struct ListNode {* int val;* ListNode *next;* ListNode() : val(0), next(nullptr) {}* ListNode(int x) : val(x), next(nullptr) {}* ListNode(int x, ListNode *next) : val(x), next(next) {}* };*/
class Solution {
public:ListNode* removeElements(ListNode* head, int val) {// 头节点while (head != NULL && head->val == val) {head = head->next;}ListNode* target = head;ListNode* last = head;while (head != NULL && target->next != NULL) {if (target->next->val == val) {target->next = target->next->next;} else {target = target->next;}}return head;}
};