Pr6R4ex3

using System;

namespace test
{
    class Program
    {
        static void Change (ref int[,] ar, ref int n, ref int[] x)
        {
            for (int j = 0; j < n; j++)
                if ((j + 1) % 2 == 0)
                    for (int i = 0; i < n; i++)
                        ar [i,j] = x[i];

        }

        static void Main()
        {
            int[,] array;
            Console.Write ("n = ");
            int n = int.Parse (Console.ReadLine ());
            array = new int[n, n];

            for (int i = 0; i < n; i++) {
                string[] s = Console.ReadLine ().Split (' ');
                for (int j = 0; j < n; j++)
                    array [i, j] = Int32.Parse (s [j]);
            }

            Console.Write ("Enter X = ");
            string[] a = Console.ReadLine ().Split(' ');
            int [] x;
            x = new int[n];
            for (int i = 0; i < n; i++)
                x [i] = Int32.Parse (a [i]);

            Change (ref array, ref n, ref x);
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++)
                    Console.Write ("{0} ", array [i, j]);
                Console.WriteLine ();
            }
        }
    }
}