[LeetCode] Add Two Numbers(stored in List)

 1 class Solution {
 2     public:
 3         ListNode* reverse(ListNode* root)
 4         {
 5             if(NULL == root)
 6                 return NULL;
 7             ListNode* pCur = root;
 8             ListNode* pNext = root->next;
 9 
10             while(pNext)
11             {
12                 pNext = pNext->next;
13                 pCur->next->next = pCur;
14                 pCur = pCur->next;
15             }
16             root->next = NULL;
17             return pCur;
18         }
19 
20 };