剑指offer题目3

题目描述
输入一个链表，从尾到头打印链表每个节点的值。

/**
*  struct ListNode {
*        int val;
*        struct ListNode *next;
*        ListNode(int x) :
*              val(x), next(NULL) {
*        }
*  };
*/
class Solution {
public:
    vector<int> printListFromTailToHead(ListNode* head) {
        vector<int> temp;
        stack<struct ListNode *> nodes;
        ListNode* thead = head;
        while(thead)
        {
            nodes.push(thead);
            thead = thead->next;
        }
        while(!nodes.empty())
        {
            thead = nodes.top();
            temp.push_back(thead->val);
            nodes.pop();
        }
        return temp;
    }
};