finally

Matrices.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Lab
+{
+    internal class Matrices
+    {
+        public static DataTable CreateMatrix(int rows, int cols, string prefix)
+        {
+            DataTable dt = new DataTable();
+
+            for (int col = 0; col < cols; col++)
+            {
+                dt.Columns.Add($"{prefix}{col + 1}", typeof(double));
+            }
+
+            for (int row = 0; row < rows; row++)
+            {
+                DataRow dr = dt.NewRow();
+
+                for (int col = 0; col < cols; col++)
+                {
+                    dr[col] = 0;
+                }
+
+                dt.Rows.Add(dr);
+            }
+
+            return dt;
+        }
+
+        public static DataTable CreateMatrixInts(int rows, int cols, string prefix)
+        {
+            DataTable dt = new DataTable();
+
+            for (int col = 0; col < cols; col++)
+            {
+                dt.Columns.Add($"{prefix}{col + 1}", typeof(int));
+            }
+
+            for (int row = 0; row < rows; row++)
+            {
+                DataRow dr = dt.NewRow();
+
+                for (int col = 0; col < cols; col++)
+                {
+                    dr[col] = 0;
+                }
+
+                dt.Rows.Add(dr);
+            }
+
+            return dt;
+        }
+
+        public static void RandomFill(DataTable dt, int minIncl, int maxIncl)
+        {
+            Random rng = new Random();
+            for (int row = 0; row < dt.Rows.Count; row++)
+            {
+                for (int col = 0; col < dt.Columns.Count; col++)
+                {
+                    dt.Rows[row][col] = (double)rng.Next(minIncl, maxIncl + 1);
+                }
+            }
+        }
+
+        public static int[,] ToArray(DataTable dt)
+        {
+            int rows = dt.Rows.Count;
+            int cols = dt.Columns.Count;
+            var array = new int[rows, cols];
+            
+            for (int row =0; row < rows; row++)
+            {
+                for (int col = 0; col < cols; col++)
+                {
+                    array[row, col] = Convert.ToInt32(dt.Rows[row][col]);
+                }
+            }
+
+            return array;
+        }
+
+        public static DataTable FromArray(int[,] array, string prefix)
+        {
+            int rows = array.GetLength(0);
+            int cols = array.GetLength(1);
+            var dt = CreateMatrix(rows, cols, prefix);
+
+            for (int row = 0; row < rows; row++)
+            {
+                for (int col = 0; col < cols; col++)
+                {
+                    dt.Rows[row][col] = array[row, col];
+                }
+            }
+
+            return dt;
+        }
+    }
+}