Kodingan Circule Link List Queue
Prerequisite –We have discussed basics and how to implement circular queue using array in set 1.In this post another method of circular queue implementation is discussed, using Circular Singly Linked List.Operations on Circular Queue:. Front:Get the front item from queue. Rear: Get the last item from queue. enQueue(value) This function is used to insert an element into the circular queue. In a circular queue, the new element is always inserted at Rear position.Steps:. Create a new node dynamically and insert value into it.
Print “Queue is Full” Else queuetail = item tail = (tail+1)%MAXSIZE 3. For enqueue of next data item, goto step 2 4. For dequeue operation, If head = tail print “Queue is Empty” Else Remove item i.e. Item = queuehead Set head = (head + 1)%MAXSIZE 5. For next dequeue operation, goto step 4 6. Circular Linked List. Circular Linked List is little more complicated linked data structure. In the circular linked list we can insert elements anywhere in the list whereas in the array we cannot insert element anywhere in the list because it is in the contiguous memory.
Check if frontNULL, if it is true then front = rear = (newly created node). If it is false then rear=(newly created node) and rear node always contains the address of the front node. deQueue This function is used to delete an element from the circular queue. In a queue, the element is always deleted from front position.Steps:. Check whether queue is empty or not means front NULL. If it is empty then display Queue is empty. If queue is not empty then step 3.
Kodingan Circle Link List Queue 2017
Check if (frontrear) if it is true then set front = rear = NULL else move the front forward in queue, update address of front in rear node and return the element. FilternoneOutput:Elements in Circular Queue are: 14 22 6Deleted value = 14Deleted value = 22Elements in Circular Queue are: 6Elements in Circular Queue are: 6 9 20Time Complexity: Time complexity of enQueue, deQueue operation is O(1) as there is no loop in any of the operation.Note: In case of linked list implementation, a queue can be easily implemented without being circular. However, in the case of array implementation, we need a circular queue to save space.This article is contributed by Akash Gupta. If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
What is Circular Queue in Java?In a standard queue data structure re-buffering problem occurs for each dequeue operation. To solve this problem by joining the front and rear ends of a queue to make the queue as a circular queueCircular queue is a.
It follows principle. In circular queue the last node is connected back to the first node to make a circle. Circular linked list fallow the First In First Out principle.
Elements are added at the rear end and the elements are deleted at front end of the queue. Both the front and the rear pointers points to the beginning of the array. It is also called as “Ring buffer”. Items can inserted and deleted from a queue in O(1) time.Program to implement Circular Queue in Java. $ javac CircularQ.java$ java CircularQEnter the size of the queue: 51: Add2: Delete3: Display4: ExitYour Choice: 1Enter number to be added: 311: Add2: Delete3: Display4: ExitYour Choice: 1Enter number to be added: 281: Add2: Delete3: Display4: ExitYour Choice: 1Enter number to be added: 91: Add2: Delete3: Display4: ExitYour Choice: 1Enter number to be added: 561: Add2: Delete3: Display4: ExitYour Choice: 3312891: Add2: Delete3: Display4: Exit.