2 курс Прога лаба 1

using System;
using System.Diagnostics;
using System.Linq;

namespace Лабы_по_проге
{
    //Класс перечисления
    enum Frequency
    {
        Weekly,
        Monthly,
        Yearly
    }

    class Article
    {
        //Самостоятельные свойства
        public Person Person { get; set; }
        public string ArticleName { get; set; }
        public double Rating { get; set; }

        //Конструкторы класса
        public Article(Person person, string articleName, double rating)
        {
            this.Person = person;
            this.ArticleName = articleName;
            this.Rating = rating;
        }

        public Article() : this(new Person(), "Bbeppep", 10d) { }

        public override string ToString()
        {
            return "Made by: " + Person + "\n" +
                   "Article Name: " + ArticleName + "\n" +
                   "Rating: " + Rating;
        }
    }

    //Класс журнал
    class Magazine
    {
        //Поля класса
        private string magazineName;
        private Frequency frequency;
        private DateTime releaseDate;
        private int quantity;
        private Article[] setOfArticles;

        //Свойства класса
        public string MagazineName {
            get { return magazineName; }
            set { magazineName = value; }
        }
        public Frequency Frequency
        {
            get { return frequency; }
            set { frequency = value; }
        }
        public DateTime ReleaseDate
        {
            get { return releaseDate; }
            set { releaseDate = value; }
        }
        public int Quantity
        {
            get { return quantity; }
            set { quantity = value; }
        }
        public Article[] SetOfArticles
        {
            get { return setOfArticles; }
            set { setOfArticles = value; }
        }

        //Среднее значение рейтинга
        public double AverageRating
        {
            get
            {
                double rating = 0;
                for(int i = 0; i < setOfArticles.Length; i++)
                {
                    rating += setOfArticles[i].Rating;
                }
                return rating / setOfArticles.Length;
            }
        }

        //Индексатор
        public bool this [Frequency frequency]
        {
            get { return this.frequency == frequency; }
        }

        //Конструкторы класса
        public Magazine(string name, Frequency frequency, DateTime date,
            int quantity, Article[] setOfArticles)
        {
            this.magazineName = name;
            this.frequency = frequency;
            this.releaseDate = date;
            this.quantity = quantity;
            this.setOfArticles = setOfArticles;
        }

        public Magazine() : this("new", Frequency.Monthly, new DateTime(1970, 1, 1), 10, new Article[] { }) { }

        //Добавление статей
        public void AddArticles(params Article[] articles)
        {
            foreach(var i in articles)
            {
                setOfArticles.Append(i);
            }
        }

        public override string ToString()
        {
            string articles = "";
            foreach(var article in setOfArticles)
            {
                articles += article.ArticleName + ", ";
            }
            return "Magazin name: " + magazineName + "\n"+
                   "Frequency: " + frequency + "\n" +
                   "Release date: " + releaseDate + "\n" +
                   "Quantity: " + quantity + "\n"+
                   "Articles: " + articles;
        }

        public virtual string ToShortString()
        {
            return "Magazin name: " + magazineName + "\n" +
                   "Frequency: " + frequency + "\n" +
                   "Release date: " + releaseDate + "\n" +
                   "Quantity: " + quantity + "\n" +
                   "Average rating: " + AverageRating;
        }

    }

    class Person
    {
        private string firstName;
        private string lastName;
        private DateTime birthDate;

        public string FirstName {
            get { return firstName; }
            set { firstName = value; }
        }
        public string LastName
        {
            get { return lastName; }
            set { lastName = value; }
        }
        public DateTime BirthDate
        {
            get { return birthDate; }
            set { birthDate = value; }
        }

        public int GetBirthYear
        {
            get { return birthDate.Year; }
            set { birthDate = new DateTime(value, birthDate.Day, birthDate.Month); }
        }

        public Person() : this("Ivan", "Ivanov", new DateTime(1970, 1, 1)) { }

        public Person(string firstName, string lastName, DateTime birthDate)
        {
            this.firstName = firstName;
            this.lastName = lastName;
            this.birthDate = birthDate;
        }

        public override string ToString()
        {
            return "First Name: " + firstName + "\n" +
                   "Second Name: " + lastName + "\n" +
                   "Birth Date: " + birthDate;
        }
        public virtual string ToShortString()
        {
            return "First Name: " + firstName + "\n" +
                   "Second Name: " + lastName;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Magazine magazine = new Magazine();

            magazine.MagazineName = "New";
            magazine.Frequency = Frequency.Yearly;
            magazine.ReleaseDate = new DateTime(2000, 2, 1);
            magazine.Quantity = 10;
            magazine.SetOfArticles = new Article[] { new Article(), new Article() };

            Console.WriteLine(magazine.ToShortString());
            magazine.AddArticles(new Article[]
            {
                new Article(new Person("Adel", "AA", new DateTime(2000, 1, 1)),"Hello", 1),
                new Article()
            });
            Console.WriteLine("__________________");
            Console.WriteLine(magazine.ToString());
            Console.WriteLine("__________________");
            Console.WriteLine(magazine[Frequency.Monthly]);
            Console.WriteLine("__________________");

            //Тестирование массивов Article
            var linearArray = new Article[1000000];
            var rectArray = new Article[1000, 1000];
            var jaggedArray = new Article[1000][];

            for (int i = 0; i < jaggedArray.Length; i++)
                jaggedArray[i] = new Article[1000];

            //test1
            var sw = Stopwatch.StartNew();

            for (int i = 0; i < 1000000; i++)
                linearArray[i] = null;

            sw.Stop();
            Console.WriteLine(sw.Elapsed);

            //test2
            sw = Stopwatch.StartNew();

            for (int i = 0; i < 1000; i++)
                for (int j = 0; j < 1000; j++)
                    rectArray[i, j] = null;

            sw.Stop();
            Console.WriteLine(sw.Elapsed);

            //test3
            sw = Stopwatch.StartNew();

            for (int i = 0; i < 1000; i++)
                for (int j = 0; j < 1000; j++)
                    jaggedArray[i][j] = null;

            sw.Stop();
            Console.WriteLine(sw.Elapsed);

        }
    }
}