Queue (Implementation)
Explore how to implement queues in C++ using a doubly linked list. Understand key queue methods like enqueue, dequeue, isEmpty, and getFront, and learn how each operation achieves constant time complexity. This lesson guides you through constructing a queue class and managing its elements efficiently.
We'll cover the following...
Implementation of Queues
Queues are implemented in many ways. They can be represented by using arrays, Linked Lists, or even Stacks. But most commonly, an array is used as it’s the easiest way to implement Queues.
With typical arrays, however, the time complexity is O(n) when dequeuing an element from the beginning of the queue. This is because when an element is removed, the addresses of all the subsequent elements must be shifted by 1, which makes it less efficient. With linked lists and doubly linked lists, the operations become faster.
Here, we will use a doubly-linked list to implement queues.
As discussed in the previous lesson, a typical Queue must contain the ...