用栈实现单链表的逆转

#include<iostream>
#include<stack>
using namespace std;
struct ListNode
{
   ListNode *next;
   int data;
   ListNode(int x):
   {
      data=x;
      next=NULL:
   }
};
  ListNode* ReverseList(ListNode* pHead) {
        if(pHead==NULL||pHead->next == NULL)
        {
            return pHead;
        }
        ListNode * p=pHead;
        ListNode * newHead;
        stack<ListNode *> stack1;
        while(p->next!=NULL)
        {
            stack1.push(p);
            p=p->next;
        }
        newHead = p;
        while(!stack1.empty())
        {
          p->next=stack1.top();
            p=p->next;
            stack1.pop();
        }
        p->next=NULL;
        return newHead;

}
int  mian()
{
 struct  ListNode *head;
  ReserveList(head);
return 0;
}