Прога

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

namespace Лабы_по_проге
{
    enum Frequency
    {
        Weekly,
        Monthly,
        Yearly
    }

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

        public Article()
        {
            this.Person = new Person();
            this.ArticleName = "Beep";
            this.Rating = 10d;
        }

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

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

    class Magazine
    {
        private string magazineName;
        private Frequency frequency;
        private DateTime releaseDate;
        private int quantity;
        private Article[] setOfArticles;

        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; }
        }

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

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

        public Magazine()
        {
            this.magazineName = "New magazin";
            this.frequency = Frequency.Monthly;
            this.releaseDate = new DateTime(01, 01, 1970);
            this.quantity = 1000;
            this.setOfArticles = new Article[] { };
        }
        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 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 ToShortSrting()
        {
            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(birthDate.Day, birthDate.Month, value);
            }
        }

        public Person()
        {
            this.firstName = "Ivan";
            this.lastName = "Ivanov";
            this.birthDate = new DateTime(01,01,1970);
        }

        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();

            Console.WriteLine(magazine.ToShortSrting());

            Console.WriteLine(magazine[Frequency.Monthly]);

            magazine.MagazineName = "New";
            magazine.Frequency = Frequency.Yearly;
            magazine.ReleaseDate = new DateTime(02, 01, 2000);
            magazine.Quantity = 10;
            magazine.SetOfArticles = new Article[] { new Article() };
        }
    }
}