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

namespace ConsoleApp1
{
    class Grishkevich4
    {
        static void Main(string[] args)

        {
            double sr;
            double x,v;
            int q;
            v = 0;
            //sr = 0;
            int w;
           // sr = 0;
           // q = 0;
            w = 0;
            x = 0;
            int[] tab = new int[100];
            double n;
            n = 1;
            string m;
            Console.Write("Podaj element menu: \n\n");
            Console.Write("n - ilość ocen\n");
            Console.Write("po - podaj oceny\n");
            Console.Write("do - drukuj oceny\n");
            Console.Write("sr - drukuj srednia\n");
            Console.Write("v - variancja\n");
            Console.Write("d - dominata\n");
            Console.Write("k-  konczy program;\n");
            Console.Write("w - drukuj wynik\n");
            Console.Write("l - podaj liczbę\n");
            Console.Write("d - drukuj liczbę\n");

            Console.Write("\n");
            do
            {
                Console.Write("\nMenu:  ");
                m = Console.ReadLine();
                switch (m)
                {
                    case "po":
                        Console.WriteLine("Podaj oceny: ");
                        for (int i = 0; i < n; i++)
                        {
                            Console.Write($"{i + 1}=");
                            tab[i] = Convert.ToInt32(Console.ReadLine());
                            
                        }
                        break;
                    case "do":
                        for (int i = 0; i < n; i++)
                            Console.WriteLine($"{i + 1} ocena={tab[i]}");
                        break;

                    case "sr":

                        q = 0;
                         sr = 0.0;
                        while (q<n)
                        {
                            
                            sr = tab[q]+sr;
                            q++;
                        }
                        sr = sr / n;
                        Console.WriteLine("Średnia ocen to: " + sr);
                            break;
                    case "v":
                         q = 0;
                        sr = 0.0;
                        while (q < n)
                        {

                            sr += tab[q] ;
                            q++;
                        }
                        sr = sr / n;
                        q = 0;
                        while (q < n)
                        {
                            v = (tab[q] - sr)*(tab[q]-sr);
                            q++;
                        }
                        v = v / n;
                        Console.WriteLine("Wariancja wynosi: " + v);
                        break;
                    case "k":
                        //Console.WriteLine("Wykonan 1 element menu\n");
                        Console.WriteLine("Konec\n");
                        goto label;
                        
                    case "l":
                        Console.WriteLine("Podaj liczbę: ");
                        x = Convert.ToDouble(Console.ReadLine());
                        break;
                    case "n":
                        Console.Write("Ilość ocen: ");
                        n = Convert.ToInt32(Console.ReadLine());
                        break;
                    case "d":
                        Console.WriteLine($"Liczba={x}");
                        break;
                    case "w":
                        Console.WriteLine("Wykonan 2 element menu\n");
                        break;
                        
                    default:
                        Console.WriteLine("-- Bląd - element menu nie istneje --\n");
                        break;
                }
            }
            while (true);
        label: Console.ReadKey();
        }
    }
}