using System;

using System.Collections.Generic; //do wykorzystania List

​

//jakby 1 plik

public class Program

{

    public static void Main(string[] args)

    {

        var book = new Book("pierwsza książka");//działanie konstruktora

        book.AddGrade(89.2);

        book.AddGrade(29.2);

        book.ShowStatistics();

​

    }

}

​

​

// tu jakby 2 plik

​

class Book{ 

    public Book(string name)

    {

        grades = new List<double>();

        this.name = name;

    }

    public void AddGrade(double grade)

    {

        grades.Add(grade);

    }

    public void ShowStatistics()

    {

        foreach( var number in grades ) {

            highGrade = Math.Max(number, highGrade);

            lowGrade = Math.Min(number, lowGrade);

            result+=number;

​

        }

        result /=grades.Count;

        Console.WriteLine("min-"+lowGrade+" max-"+highGrade+" avg-"+result);

    } 

    private List<double> grades;

    private string name; 

    private double highGrade = double.MinValue;

    private double lowGrade = double.MaxValue;

    private double result;

​

}

​