addTwoNumber

leetcode--addTwoNumber

(```)

struct ListNode* addTwoNumbers(struct ListNode* l1, struct ListNode* l2){
struct ListNode dummy;
dummy.next = NULL;
struct ListNode *p, *node;
struct ListNode *p1, *p2;
p = &dummy; p1 =l1; p2 = l2;

int cin=0, sum=0;
while(p1 || p2){
sum = cin;
if(p1){
sum += p1->val;
p1 = p1->next;
}
if(p2){
sum += p2->val;
p2 = p2->next;
}

node = (struct ListNode*)malloc(sizeof(struct ListNode));
node->val = sum % 10;
node->next = NULL;
p->next = node;
p= node;

cin = sum / 10;

}
if(cin){
node = (struct ListNode*)malloc(sizeof(struct ListNode));
node->val = cin;
node->next = NULL;
p->next = node;
p = node;
}
return dummy.next;
}

(```)