![]() Customers calling a call center are kept in queues when they wait for someone to pick up the calls.It can be also used by an operating system when it has to schedule jobs with equal priority.Queue is used to implement many algorithms like Breadth First Search (BFS), etc.Queues are used in a lot of applications, few of them are: IsFull → It is used to check whether the queue is full or not.įront → It is similar to the top operation of a stack i.e., it returns the front element of the queue (but don’t delete it).īefore moving forward to code up these operations, let’s discuss the applications of a queue. IsEmpty → It is used to check whether the queue has any element or not. As stated earlier, any new item enters at the tail of the queue, so Enqueue adds an item to the tail of a queue.ĭequeue → It is similar to the pop operation of stack i.e., it returns and deletes the front element from the queue. But let’s first discuss the operations which are done on a queue.Įnqueue → Enqueue is an operation which adds an element to the queue. Similar to the stack, we will implement the queue using a linked list as well as with an array. Similar to a queue of day to day life, in Computer Science also, a new element enters a queue at the last (tail of the queue) and removal of an element occurs from the front (head of the queue). For example, a new person enters a queue at the last and the person who is at the front (who must have entered the queue at first) will be served first. It is equivalent to the queues in our general life. A queue follows FIFO (First-in, First out) policy. You can also read the below topics.Similar to stacks, a queue is also an Abstract Data Type or ADT. ![]() Output ***Queue Implementation using Singly LinkedList*** Struct node* temp=(struct node*)malloc(sizeof(struct node)) Printf ("\nPlease Enter a Valid Choice\n ") Printf("4.Display the first element in the queue \n") Printf("3.Display all elements of queue \n") Printf("2.Delete element from queue (Dequeue) \n") Printf("1.Insert element to queue (Enqueue) \n") Printf("***Queue Implementation using Singly LinkedList***\n") Now we can combine the above logic and code. } Queue implementation in C Complete Source Code Printf("First element in the queue is:%d\n", front->data) This operation will not remove the element. This function is used to see the element in the front of the queue. We have to traverse throughout the queue one by one. Printf("The deleted element from queue is:%d\n",temp->data) The below image explains the Dequeue process. Set the FRONT pointer to point to the FRONT’s next node.
0 Comments
Leave a Reply. |