请问这里的三目表达式在c++中哪里有问题啊?
具体的错误列表:
整体代码:
#include<iostream>
using namespace std;
struct ListNode
{
int val;
ListNode* next;
ListNode(int val = 0, ListNode* next = nullptr) :val(val), next(next)//父类中是需要进行显示调用构造函数的
{
}
};
class Solution {
public:
ListNode* swapPairs(ListNode* head) {
if (head == nullptr)
return nullptr;
ListNode* cur = head;
while (cur)
{
static ListNode* next = cur->next->next;
static ListNode* prev = cur->next;
prev->next = cur;
cur->next = next;
cur = next;
}
ListNode* res = cur == nullptr ? prev : cur;
return res;
}
};
int main()
{
Solution a;
ListNode* newnode = new ListNode(0, nullptr);
a.swapPairs(newnode);
return 0;
}