LinkedList Length#9899
Given a linked list, find its length. The length of a linked list is the number of its elements.
Definition of a single linked list:
// Java
class ListNode {
int val;
ListNode next;
ListNode(int x) {
val = x;
next = null;
}
}// C++
class ListNode
{
public:
int val;
ListNode *next;
ListNode(int x) : val(x), next(NULL) {}
};// C
struct ListNode
{
int val;
struct ListNode *next;
};Implement function length to find the length of linked list.
// Java
int length(ListNode head)// C, C++
int length(ListNode *head)
The length of a linked list is 3.