题解 | #判断链表中是否有环#
判断链表中是否有环
https://www.nowcoder.com/practice/650474f313294468a4ded3ce0f7898b9
#include <stdbool.h>
/**
* struct ListNode {
* int val;
* struct ListNode *next;
* };
*
* C语言声明定义全局变量请加上static，防止重复定义
*/
/**
*
* @param head ListNode类
* @return bool布尔型
*/
bool hasCycle(struct ListNode* head ) {
struct ListNode *slow=head, *fast=head;
while(fast && fast->next)
{
slow = slow->next;
fast = fast->next->next;
if(slow == fast)
return true;
}
return false;
}
