using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace MatrixMako

{

    public class Program

    {

        public static void Main(string[] args)

        {

            int s = 0;

            int[,] a;

            a = Nactimatici();

            int pocetRadku = a.GetLength(0);

            int pocetSloupcu = a.GetLength(1);

​

            Vypis("Původní matice",a,pocetRadku,pocetSloupcu);

            for (int i = 0; i < pocetRadku; i++)

            {

                s = Soucet(a, i, pocetSloupcu);

                Console.WriteLine("součet {0}. řádků je {1}", i, s);

            }

​

            Console.ReadLine();

​

        }

        static int [,] Nactimatici()

        {                        

            int[,] pole={ {   4,8,2,3},

                            { 8,7,3,1},

                            { 5,1,2,3},

                            { 4,4,1,7} };

            return pole;

        }

        static void Vypis(string nadpis,int [,]pole, int radky, int sloupce )

        {

            Console.WriteLine(nadpis);

            for (int i = 0; i < radky; i++)

            {

                for (int j = 0; j < sloupce; j++)

                {

                    Console.Write("{0,3}",pole[i,j]);

                }

                Console.WriteLine();

            }

        }

        static void Vymenprvky(ref int radek1, ref int radek2)

        {

            int pomocny;

            pomocny=radek1;

            radek1 = radek2;

            radek2 = pomocny;

        }

        static int Soucet(int[,] pole,int radek, int pocetSloupcu)

        {

            int  soucet = 0;

            for (int i = 0; i < pocetSloupcu; i++)

            {

                soucet = soucet + pole[radek, i];          

            }

            return soucet;

        }

    }

}