using System;

public class Test
{
	
	

    public static void MultiplyMatrix()
    {
    	int[,] a = new int[5, 5];
    	int[,] b = new int[5, 5];
    	int[,] c = new int[5, 5];
    	
    	Random ran = new Random();

// Инициализируем данный массив
for (int i = 0; i < 4; i++)
{
    for (int j = 0; j < 5; j++)
    {
       a[i, j] = ran.Next(1, 15);
       b[i, j] = ran.Next(1, 15);
       c[i, j] = ran.Next(1, 15);
    }
    Console.WriteLine();
}
    	
        if (a.GetLength(1) == b.GetLength(0))
        {
            c = new int[a.GetLength(0), b.GetLength(1)];
            for (int i = 0; i < c.GetLength(0); i++)
            {
                for (int j = 0; j < c.GetLength(1); j++)
                {
                    c[i, j] = 0;
                    for (int k = 0; k < a.GetLength(1); k++) // OR k<b.GetLength(0)
                        c[i, j] = c[i, j] + a[i, k] * b[k, j];
                }
            }
        }
        else
        {
        	Console.WriteLine(c[1, 1]);
            Console.WriteLine("\n Number of columns in First Matrix should be equal to Number of rows in Second Matrix.");
            Console.WriteLine("\n Please re-enter correct dimensions.");
            Environment.Exit(-1);
        }
    }
    
	public static void Main()
	{
		
		MultiplyMatrix ();
	}
}