Question

How to sort each column of a matrix with strings in C#

Answer 1

using System;

class MatrixColumnSorter
{
    static void SortColumns(string[,] matrix) {
        int rows = matrix.GetLength(0);
        int cols = matrix.GetLength(1);

        for (int col = 0; col < cols; col++) {
            // Extract column into an array
            string[] column = new string[rows];
            for (int row = 0; row < rows; row++) {
                column[row] = matrix[row, col];
            }

            // Sort the column
            Array.Sort(column);

            // Place sorted values back into the matrix
            for (int row = 0; row < rows; row++) {
                matrix[row, col] = column[row];
            }
        }
    }

    static void PrintMatrix(string[,] matrix) {
        int rows = matrix.GetLength(0);
        int cols = matrix.GetLength(1);

        for (int row = 0; row < rows; row++) {
            for (int col = 0; col < cols; col++) {
                Console.Write(matrix[row, col] + " ");
            }
            Console.WriteLine();
        }
    }

    static void Main()
    {
        string[,] matrix = {
            {"ccc", "zzzz", "x"},
            {"eeee", "aaa", "ffff"},
            {"uu", "hhh", "uuu"},
            {"bbb", "gg", "yyyyyy"}
        };

        Console.WriteLine("Original Matrix:");
        PrintMatrix(matrix);

        SortColumns(matrix);

        Console.WriteLine("\nSorted Matrix:");
        PrintMatrix(matrix);
    }
}


 
/*
run:
 
Original Matrix:
ccc zzzz x 
eeee aaa ffff 
uu hhh uuu 
bbb gg yyyyyy 

Sorted Matrix:
bbb aaa ffff 
ccc gg uuu 
eeee hhh x 
uu zzzz yyyyyy 
 
*/

 

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