Thread: Max element in matrix

Assuming it's already late, and this is more extravagant than your teacher would expect, this would work:

Code:

    class Program
    {
        private static void Main(string[] args)
        {
            int[,] matrix = new int[4, 5]
                {
                    { 5, 7, 3, 4, 8 },
                    { 4, 5, 9, 4, 6 },
                    { 3, 10, 6, 7, 5 },
                    { 6, 4, 8, 1, 9 }
                };

            int[,] maxes = new int[4, 5];

            for (int row = 0; row <= matrix.GetUpperBound(0); ++row)
            {
                for (int column = 0; column <= matrix.GetUpperBound(1); ++column)
                {
                    maxes[row, column] = matrix.GetMaxValue(row, column);
                }
            }

            for (int row = 0; row <= matrix.GetUpperBound(0); ++row)
            {
                for (int column = 0; column <= matrix.GetUpperBound(1); ++column)
                    Console.Write("{0,2} ", maxes[row, column]);

                Console.WriteLine();
            }
        }
    }

    public static class Extensions
    {
        public static int GetMaxValue(this int[,] matrix, int row, int column)
        {
            int max = int.MinValue;

            for (int c = 0; c <= matrix.GetUpperBound(1); ++c)
                if (max < matrix[row, c])
                    max = matrix[row, c];

            for (int r = 0; r <= matrix.GetUpperBound(0); ++r)
                if (max < matrix[r, column])
                    max = matrix[r, column];

            return max;
        }
    }

Output:

Code:

 8 10  9  8  9
 9 10  9  9  9
10 10 10 10 10
 9 10  9  9  9