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struct Node
int data;
struct Node *next; struct Node *prev;
}; void insertStart (struct Node **head, int data)
// creating memory for newNode
struct Node *newNode = (struct Node *) malloc (sizeof (struct Node));
// assigning newNode's next as the current head
// Assign data & and make newNode's prev as NULL
newNode->data = data;
newNode->next = *head;
newNode->prev = NULL;
// if list already had item(s)
// We need to make current head previous node as this new node
if (*head != NULL)
(*head)->prev = newNode;
// change head to this newNode *head = newNode;
Run
}
void display (struct Node *node)
struct Node *end;
printf ("nIn Forward Directionn"); while (node != NULL)
printf ("d", node->data);
end = node;
node node->next;
}
printf ("nIn Backward direction n"); while (end != NULL)
printf ("%d", end->data); end end->prev;
}
int main ()
struct Node *head = NULL;
// Need '&' 1.e. address as we need to change head insertStart (&head, 1); insertStart (&head, 3);
insertStart (&head, 2);
// no need for '&' as head need not be changed
// only doing traversal
display (head);
return 0;
}
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