CODE EXAMPLE FOR CPP

find node from pos linkedlist java

// Java program to find n'th node in linked list
 
class Node {
    int data;
    Node next;
    Node(int d)
    {
        data = d;
        next = null;
    }
}
 
class LinkedList {
    Node head; // the head of list
 
    /* Takes index as argument and return data at index*/
    public int GetNth(int index)
    {
        Node current = head;
        int count = 0; /* index of Node we are
                          currently looking at */
        while (current != null)
        {
            if (count == index)
                return current.data;
            count++;
            current = current.next;
        }
 
        /* if we get to this line, the caller was asking
        for a non-existent element so we assert fail */
        assert (false);
        return 0;
    }
 
    /* Given a reference to the head of a list and an int,
       inserts a new Node on the front of the list. */
    public void push(int new_data)
    {
 
        /* 1. alloc the Node and put data*/
        Node new_Node = new Node(new_data);
 
        /* 2. Make next of new Node as head */
        new_Node.next = head;
 
        /* 3. Move the head to point to new Node */
        head = new_Node;
    }
 
    /* Driver code*/
    public static void main(String[] args)
    {
        /* Start with empty list */
        LinkedList llist = new LinkedList();
 
        /* Use push() to construct below list
           1->12->1->4->1  */
        llist.push(1);
        llist.push(4);
        llist.push(1);
        llist.push(12);
        llist.push(1);
 
        /* Check the count function */
        System.out.println("Element at index 3 is "
                           + llist.GetNth(3));
    }
}