HW 3_1_3

using System;

namespace HomeWork
{
    class Program
    {
        static void Main(string[] args)
        {
            int sumSecondRow = 0;
            int productColumn = 1;
            int numberLine = 1;
            int numberColumn = 0;

            int[,] userNumbers = {
            { 1, 2, 3, 10},
            { 4, 5, 6, 11},
            { 7, 8, 9, 12 }
            };

            Console.WriteLine("Исходная матрица:");

            for (int i = 0; i < userNumbers.GetLength(0); i++)
            {
                for (int j = 0; j < userNumbers.GetLength(1); j++)
                {
                    Console.Write(userNumbers[i, j] + "\t");
                }
                Console.WriteLine();
            }

            for (int i = 0; i < userNumbers.GetLength(1); i++)
            {
                sumSecondRow += userNumbers[numberLine, i];
            }

            for (int j = 0; j < userNumbers.GetLength(0); j++)
            {
                productColumn *= userNumbers[j, numberColumn];
            }

            Console.WriteLine($"Сумма {numberLine + 1} строки = {sumSecondRow}");
            Console.WriteLine($"Произведение {numberColumn + 1} столбца = {productColumn}");

            Console.ReadKey();
        }
    }
}