结构体的构造函数

#include<bits/stdc++.h>
using namespace std;
struct ListNode
{
	int val;
	ListNode* next;
	ListNode(int x) :val(x), next(NULL) {};
};
ListNode* CreateListNode(int arr[], int n)
{
	ListNode* head;
	head = new ListNode(arr[0]);
	ListNode* cur;
	cur = head;
	for (int i = 1; i < n; i++)
	{
		cur->next = new ListNode(arr[i]);
		cur = cur->next;
	}
	return head;
}
int main()
{
	int n;
	scanf("%d", &n);
	int i;
	int a[100];
	for (i = 0; i < n; i++)
	{
		scanf("%d", &a[i]);
	}
	ListNode* head = CreateListNode(a, n);
	while (head != NULL)
	{
		printf("%d ", head->val);
		head = head->next;
	}
}