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

namespace ConsoleApplication32
{
    public class Program
    {
        static void Main(string[] args)
        {
            Journal journal = CreateJournal();

            Console.WriteLine("кого искать?");
            Student result = journal.Search(Console.ReadLine());
            if (result != null)
            {
                Console.WriteLine("{0} {1}", result.Firstname, result.Lastname);
                for (int i = 0; i < result.Rating.Length; i++)
                    Console.Write(result.Rating[i] + " ");
                Console.WriteLine("\n" + result.Calc());
            }
            else
                Console.WriteLine("Поиск не дал результата");
        }

        private static Journal CreateJournal()
        {
            Journal journal = new Journal();
            journal.Addstudent("John", "Smith", Rand());
            journal.Addstudent("Han", "Solo", Rand());
            journal.Addstudent("Johny", "Cash", Rand());
            journal.Addstudent("Axel", "Foley", Rand());
            return journal;
        }

        public static double[] Rand()
        {
             double[] rand = new double[5];
             Random rnd = new Random();
             for (int i = 0; i < rand.Length; i++)
                rand[i] = rnd.Next(1,5);
             return rand;
        }

    }

    class Journal
    {
        private List<Student> students = new List<Student>();

        public void Addstudent(string studentFname, string studentLname, double[] rate)
        {
            Student student = new Student();

            student.Firstname = studentFname;
            student.Lastname = studentLname;
            student.Rating = rate;
            students.Add(student);
        }

        public Student Search(string searchfirstname)
        {
            foreach (Student i in students)
                if (i.Firstname == searchfirstname)
                    return i;
            return null;
        }

        public List <Student> Searchstudents(string searchfirstname)
        {
            List<Student> Searchresult = new List<Student>();
            foreach (Student i in students)
            {
                if (i.Firstname == searchfirstname)
                    Searchresult.Add(i);
            }
            return Searchresult;
        }
    }

    public class Student
    {
        public string Firstname;
        public string Lastname;
        public double[] Rating;

        public double Calc()
        {
            double sum = 0;
            for (int i = 0; i < Rating.Length; i++)
                sum += Rating[i];
            return sum / Rating.Length;
        }
    }


}