Circular Linked List
A circular linked list is a data structure that is slightly more complex than a linked list. It is a linked list where all the nodes are connected in a loop and form a chain. The last node does not have a NULL. Instead, it stores the address of the linked list head. It is dynamic in nature because we can insert elements anywhere. We can start traversing the linked list from any point on the linked list. We can create a circular linked list from both singly and doubly linked lists.
In a doubly linked list, tailthe next pointer of points to head, and headthe previous pointer of points to tail, forming a doubly circular linked list.
Why is it a cycle?
- Useful for implementing several data structures (e.g. queues, Fibonacci heaps). An efficient queue can be built without using two separate pointers for
frontand , and inserting just a pointer to is sufficient for insertion or deletion since the predecessor is just the next pointer in .reartailtail - It is used in CPU scheduling to maintain jobs in a queue and assign one of them a time to execute while the rest wait. It helps to cycle through all jobs quickly and distribute resources to each job fairly until all jobs are finished.
- Use this in multiplayer games to store the next player to play.
- We can insert an element at any position in a circular linked list. We can start traversal from any point.
Basic operations on circular linked lists
We can perform the following operations on a circular linked list.
插入: Insert an element into a circular linked list.删除: Removes the elements present in the circular linked list.遍历: Traverse the contents of a circular linked list.搜索: Checks if an element exists in a linked list.
We will cover all of these operations in detail in subsequent articles.
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