using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace queue
{
    class ArrayQueue
    {

        int[] a;

        int rear;
        int front;

        public ArrayQueue(int size)
        {

            a = new int[size];

            rear = front = -1;


        }


        public void inqueue(int item)
        {

            if (rear == a.Length - 1)
                Console.WriteLine("queue is full");

            else
            {
                if (front == -1)
                    front = 0; // to put front in first index of array


                rear++;
                a[rear] = item;
            }


        } //end inqueue


        public void dequeue()
        {

            if (front == -1 || (front>rear))
                Console.WriteLine("queue is underflow");

            else
            {

                Console.WriteLine("the elemernt which delete it : "+a[front]);

                front++;




            }

        }//end

        public void display()

        {

            for (int i = front; i <= rear; i++)
            {
                Console.WriteLine("the Queue is :"+a[i]);
            }


        }










    }
}