Warshall's Algorithm

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] matrixarray = { {0, 1, 0, 0}
                               ,{0, 1, 0, 1},
                               {0, 0, 1, 1}, 
                               {0, 1, 0, 0} };
            newclass obj = new newclass();
            obj.mat(matrixarray);
            Console.ReadLine();
        }
    }
    class newclass
    {
        public static int rc = 4;
        public void mat(int[,] mn)
        {
            int[,] matrixarray = new int[rc, rc];
            for (int i = 0; i < rc; i++)
            {
                for (int j = 0; j < rc; j++)
                {
                    matrixarray[i, j] = mn[i, j];
                }
            }
            for (int i = 0; i < rc; i++)
            {
                for (int j = 0; j < rc; j++)
                {
                    for (int k = 0; k < rc; k++)
                    {
                        matrixarray[j, k] = (matrixarray[j, k] != 0) || ((matrixarray[i, k] != 0) && (matrixarray[j, i] != 0)) ? 1 : 0;
                    }
                }
            }
            matrixarrayPrinter(matrixarray);
        }
        public void matrixarrayPrinter(int[,] mn)
        {
            for (int i = 0; i < rc; ++i)
            {
                for (int j = 0; j < rc; ++j)
                {
                    if (mn[i, j] == 99999)
                    {
                        Console.Write("\t");
                    }
                    else
                    {
                        Console.Write(mn[i, j] + "\t");
                    }
                }
                Console.WriteLine();
            }
        }
    }
    
}