如何打印链表中的元素

#include <iostream>

// 定义链表节点结构
struct ListNode {
    int val;
    ListNode* next;
    ListNode(int x) : val(x), next(nullptr) {}
};

// 打印链表元素
void printLinkedList(ListNode* head) {
    ListNode* curr = head;
    while (curr != nullptr) {
        std::cout << curr->val << " ";
        curr = curr->next;
    }
    std::cout << std::endl;
}

int main() {
    // 创建链表
    ListNode* head = new ListNode(1);
    ListNode* node1 = new ListNode(2);
    ListNode* node2 = new ListNode(3);
    head->next = node1;
    node1->next = node2;

    // 打印链表元素
    printLinkedList(head);

    // 释放链表内存
    delete head;
    delete node1;
    delete node2;

    return 0;
}