What are doubly linked lists in C++?

What are doubly linked lists in C++?

Doubly linked lists are data structures where each node contains a reference to both the next and previous node.

How do I implement a doubly linked list in C++?

You can implement it by creating a Node class with pointers to the next and previous nodes, and a List class to manage them.

What are the advantages of using doubly linked lists?

They allow traversal in both directions and make certain operations, like deletion, more efficient.

Can you show me a simple code example?

Sure! Here's a basic implementation:

class Node {
public:
    int data;
    Node* next;
    Node* prev;
    Node(int val) : data(val), next(nullptr), prev(nullptr) {}
};

class DoublyLinkedList {
private:
    Node* head;
    Node* tail;
public:
    DoublyLinkedList() : head(nullptr), tail(nullptr) {}
    // Add methods for insertion, deletion, etc.
};