using System;

namespace Macierze
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] tabA = new int[3, 3] { { 1, 3, 2 }, { -2, 0, 1 }, { 5, -3, 2 } };
            int[,] tabB = new int[2, 3] { { 2, 1, 3 }, { -1, 4, 0 } };

            int[,] result = Multiply(tabA, tabB);

            Draw(result);

            Console.ReadKey();
        }

        public static int[,] Multiply (int[,] tabA, int[,] tabB)
        {
            if (tabA.GetLength(1) == tabB.GetLength(1))
            {
                int[,] result;
                int row = new int();
                bool aFirst = true;

                if (tabA.Length > tabB.Length)
                {
                    result = new int[tabB.GetLength(0), tabA.GetLength(1)];
                    aFirst = false;
                }
                else
                {
                    result = new int[tabA.GetLength(0), tabB.GetLength(1)];
                    aFirst = false;
                }



                for (int i = 0; i < tabB.GetLength(0); i++)
                {
                    for (int j = 0; j < tabA.GetLength(0); j++)
                    {
                        for (int k = 0; k < tabB.GetLength(1); k++)
                        {
                            try
                            {
                                if (aFirst)
                                    row += tabA[i, k] * tabB[k, j];
                                else
                                    row += tabB[i, k] * tabA[k, j];
                            }
                            catch (IndexOutOfRangeException ex)
                            {
                                Console.WriteLine(ex.Message + " (k - " + k + " j - " + j + " i - " + i + ") aFirst = " + aFirst);
                            }
                        }
                        result[i, j] = row;
                        row = 0;
                    }
                }
                return result;
            }
            else
                return new int[0,0];


        }

        public static void Draw(int[,] macierz)
        {
            for (int i = 0; i < macierz.GetLength(0); i++)
            {
                for (int j = 0; j < macierz.GetLength(1); j++)
                {
                    Console.Write(macierz[i, j] + " ");
                }
                Console.WriteLine();
            }
        }
    }
}