Initial data commit

Task/Move-to-front-algorithm/C-sharp/move-to-front-algorithm.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace MoveToFront
+{
+    class Program
+    {
+        private static char[] symbolTable;
+        private static void setSymbolTable()
+        {
+            symbolTable = "abcdefghijklmnopqrstuvwxyz".ToCharArray();
+        }
+
+        private static void moveToFront(int charIndex)
+        {
+            char toFront = symbolTable[charIndex];
+            for (int j = charIndex; j > 0; j--)
+            {
+                symbolTable[j] = symbolTable[j - 1];
+            }
+            symbolTable[0] = toFront;
+        }
+
+        public static int[] Encode(string input)
+        {
+            setSymbolTable();
+            var output = new List<int>();
+            foreach (char c in input)
+            {
+                for (int i = 0; i < 26; i++)
+                {
+                    if (symbolTable[i] == c)
+                    {
+                        output.Add(i);
+                        moveToFront(i);
+                        break;
+                    }
+                }
+            }
+            return output.ToArray();
+        }
+
+        public static string Decode(int[] input)
+        {
+            setSymbolTable();
+            var output = new StringBuilder(input.Length);
+            foreach (int n in input)
+            {
+                output.Append(symbolTable[n]);
+                moveToFront(n);
+            }
+            return output.ToString();
+        }
+
+        static void Main(string[] args)
+        {
+            string[] testInputs = new string[] { "broood", "bananaaa", "hiphophiphop" };
+            int[] encoding;
+            foreach (string s in testInputs)
+            {
+                Console.WriteLine($"Encoding for '{s}':");
+                encoding = Encode(s);
+                foreach (int i in encoding)
+                {
+                    Console.Write($"{i} ");
+                }
+                Console.WriteLine($"\nDecoding for '{s}':");
+                Console.WriteLine($"{Decode(encoding)}\n");
+            }
+        }
+    }
+}