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

namespace zh
{
    class Program
    {
        static int[,] matrix = new int[4, 4];
        static void Main(string[] args)
        {
            feltoltes();
            kiiras();
            oszlopindexsum();
            foatloatlag();
            Console.ReadKey();
        }
        static void feltoltes()
        {
            Random r = new Random();
            for (int i = 0; i < 4; i++)
            {
                for (int x = 0; x < 4; x++)
                {
                    matrix[i, x] = r.Next(10, 51);
                }
            }
        }
        static void kiiras()
        {
            int i = 0;
            do
            {
                for (int j = 0; j < 4; j++)
                {
                    Console.Write(matrix[i,j]+" ");
                }
                Console.WriteLine();
                i++;
            } while (i!=4);
        }
        static void oszlopindexsum()
        {
            int sum = 0;
            for (int i = 0; i < 4; i++)
            {
                for (int x = 0; x < 4; x++)
                {
                    sum += matrix[x,i];
                }
                Console.WriteLine(i+1 + ". oszlop összege:" +sum);
                sum = 0;
            }
        }
        static void foatloatlag()
        {
            int sum = 0;
            for (int i = 0; i < 4; i++)
            {
                sum += matrix[i, i];
            }
            Console.WriteLine(sum/4+ " a főátlóban szereplő elemek átlaga!");
        }
    }
}