Queue

using System;

namespace Fronta
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");

            fronta frontal = new fronta(15);
            Console.WriteLine(frontal.isempty());
            frontal.enqueue(50);
            frontal.peek();
            frontal.enqueue(15);
            frontal.dequeue();
            frontal.peek();
        }
    }
}



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

namespace Fronta
{
    class fronta
    {
        private int[] fronticka = new int[0];
        private bool prazdnota;
        private int index = 0;
        private int start = 0;

        public fronta(int n)
        {
            fronticka = new int[n];
        }

        public bool isempty()
        {
            prazdnota = true;
            if (index == start)
            {
                prazdnota = false;
            }
            return prazdnota;
        }

        public void enqueue(int prvek)
        {
                fronticka[index] = prvek;
                index++;
        }

        public void peek()
        {
            Console.WriteLine(fronticka[index - 1]);
        }

        public void dequeue()
        {
            fronticka[start] = 0;
            start++;
        }
    }
}