q2

void dic(node*& head, node*& tail)
{
    int count = 1;
    node* temp = new node;
    temp = head;
    while (temp != NULL)
    {
        if (count == 4)
        {
            temp->data += 20;
        }
        else if(count == 6)
        {
            temp->data += 20;
        }
        temp = temp->next;
        count++;
    }
    temp = head;
    cout << "\n\nprint it\n\n";
    while (temp != NULL)
    {
        cout << "--| " << temp->data << endl;
        temp = temp->next;
    }
}