LeetCode2-两数之和-大整数加法

原题链接

class Solution {
public:
    ListNode* addTwoNumbers(ListNode* l1, ListNode* l2) {
        ListNode* dummy = new ListNode(-1);
        ListNode* cur = dummy;
        int t = 0;
        while(l1 || l2 || t){
            if(l1)  t += l1 -> val, l1 = l1 -> next;
            if(l2)  t += l2 -> val, l2 = l2 -> next;
            ListNode* node = new ListNode(t % 10);
            cur -> next = node;
            cur = cur -> next;
            t /= 10; 
        }
        return dummy -> next;
    }
};