ADT Circular Queue enqueue and dequeue

ADT Circular Queue enqueue and dequeue

By : phee
Date : November 22 2020, 10:56 AM
wish helps you Let me give you an example :
See this image : Enqueue image (I can't post image here due to reputation points, So, giving the link)
code :
++q->tail;    // or q->tail=q->tail+1 or q->tail+=1;

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Priority Queue with O(1) Dequeue and O(whatever) Enqueue

Priority Queue with O(1) Dequeue and O(whatever) Enqueue

By : ProfessorDiehl
Date : March 29 2020, 07:55 AM
Hope that helps You could store the queue as a sorted linked list. Removing the front element is O(1) and inserting an element at the correct position is O(n).
Using a For Loop to Enqueue and Dequeue a Queue - C++

Using a For Loop to Enqueue and Dequeue a Queue - C++

By : R. K.
Date : March 29 2020, 07:55 AM
I wish did fix the issue. while(intQueue.enqueue(i)) will continue to be executed as long as intQueue.enqueue(i)) returns a value that evaluates to true.
What you need to use is if.
code :
for(int i = 1; i <= 10; i++)
   if (i % 2 == 0)
      if (intQueue.enqueue(i))
          cout << i << " has been added to the queue . . .\n";
          cout << i << " has not been added to the queue . . .\n";
Enqueue/Dequeue/Insert struct in a queue

Enqueue/Dequeue/Insert struct in a queue

By : matsgemmeke
Date : March 29 2020, 07:55 AM
I wish did fix the issue.
Do not cast malloc return value
code :
struct queue* tmp = malloc(sizeof(*tmp));
struct RCB* dequeue(struct queue* queue) {
        struct RCB *tmp1; 
        struct RCB *tmp2; 
        if(queue->front == NULL && queue->back == NULL) {
            printf("queue is empty\n"); 
        tmp1 = queue->front; 
        tmp2 = tmp1->next; 
        queue->front = tmp2; 
        if(queue->front == NULL) {
            queue->back = queue->front;
                printf("removed rcb from queue\n");  
        return tmp1; 
dequeue and enqueue methods in queue implementation

dequeue and enqueue methods in queue implementation

By : midou
Date : March 29 2020, 07:55 AM
wish of those help I was reading about queues in java implementation. I found the following code
code :
public String dequeue() {
    if (isEmpty()) {
        throw new RuntimeException("Queue underflow");
    } else if (first == last) {
        String f = first.item;
        first = null;
        last = null;
        return f;

    String f = first.item;
    first = first.next;
    return f;

public void enqueue(String item) {
    Node x = new Node(item);
    if (first == null && last == null) {
        first = x;
        last = x;
        return; // return back when first node is enqueued
    last.next = x;
    last = x;
Implementing Enqueue and Dequeue for Queue using Alloy

Implementing Enqueue and Dequeue for Queue using Alloy

By : Manvitha
Date : March 29 2020, 07:55 AM
hop of those help? Having the following: , You can define enqueue easily:
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