#include <iostream>
using namespace std;
struct ListNode {int val;        //存储数据ListNode *next; //next指针ListNode(int x) : val(x), next(NULL) {}
};
ListNode* creatLinkedList(int arr[],int n)
{if(n == 0)return NULL;ListNode* head = new ListNode(arr[0]);ListNode* curNode = head;for(int i = 1;i < n;i++){curNode->next = new ListNode(arr[i]);curNode = curNode->next;}return head;
}void printLinkedList(ListNode* head)
{ListNode* curNode = head;while(curNode != NULL){cout<<curNode->val<<"->";curNode = curNode->next;}cout<<"NULL"<<endl;return;
}int main()
{int arr[] = {1,2,3,4,5};int n = sizeof(arr)/sizeof(int);ListNode* head = creatLinkedList(arr,n);printLinkedList(head);return 0;
}