add_two_numbers
add_two_numbers.cpp 源码
//
// Created by roseduan on 2021/9/18.
// 两数相加
#include "iostream"
#include "stdio.h"
using namespace std;
struct ListNode {
int val;
ListNode *next;
ListNode() : val(0), next(nullptr) {}
ListNode(int x) : val(x), next(nullptr) {}
ListNode(int x, ListNode *next) : val(x), next(next) {}
};
class Solution{
public:
ListNode* addTwoNumbers(ListNode* l1, ListNode* l2) {
auto *dummy = new ListNode();
auto p = dummy;
int count = 0;
while (l1 || l2) {
if (l1) {
count += l1->val;
l1 = l1->next;
}
if (l2) {
count += l2->val;
l2 = l2->next;
}
p->next = new ListNode(count % 10);
count /= 10;
p = p->next;
}
if (count > 0) {
p->next = new ListNode(count);
}
return dummy->next;
}
};
int main() {
auto *node1 = new ListNode(8);
node1->next = new ListNode(9);
auto *node2 = new ListNode(4);
node2->next = new ListNode(6);
Solution sol;
ListNode *res = sol.addTwoNumbers(node1, node2);
while (res) {
printf("%d\n", res->val);
res = res->next;
}
}
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