تحديات برمجيةالتحدي الخامس - حل التمرين الثاني بلغة C#

using System;

class Program
{
    static void Main(string[] args)
    {

        int[,] matrix = {
            {5, 2, 3},
            {4, 5, 6},
            {5, 8, 9}
        };

        int found = 0;
        int x;

        Console.Write("Enter a number: ");
        x = int.Parse(Console.ReadLine());

        for (int i = 0; i < matrix.GetLength(0); i++)
        {
            for (int j = 0; j < matrix.GetLength(1); j++)
            {
                if (x == matrix[i, j])
                {
                    found++;
                }
            }
        }

        if (found == 0)
        {
            Console.WriteLine("'" + x + "' is not found");
        }
        else
        {
            Console.WriteLine("'" + x + "' is found " + found + " time(s)");
        }

        Console.ReadKey();
    }
}