Extract out tape class in BrainmessShort

csharp/BrainmessShort/BrainmessShort.csproj

@@ -66,6 +66,7 @@
     <Compile Include="StringExtensionsTests.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="ProgramTests.cs" />
+    <Compile Include="Tape.cs" />
   </ItemGroup>
   <ItemGroup>
     <BootstrapperPackage Include="Microsoft.Net.Client.3.5">

csharp/BrainmessShort/Main.cs

@@ -6,12 +6,12 @@ namespace BrainmessShort
    public class Brainmess
    {
         private readonly Program _program;
-
-        private readonly int[] tape = new int[5000];
-        private int tc = 2500;
+        private readonly Tape _tape;
+
         public Brainmess(string programString) 
         {
             _program = new Program(programString);
+            _tape = new Tape();
         }
 
         public static void Main(string[] args)
@@ -21,37 +21,7 @@ public static void Main(string[] args)
             reader.Close();
         }
 
-        int MoveForward()
-        {
-            return tc++;
-        }
-
-        int MoveBackward()
-        {
-            return tc--;
-        }
-
-        int Increment()
-        {
-            return tape[tc]++;
-        }
 
-        int Decrement()
-        {
-            return tape[tc]--;
-        }
-
-        int Current
-        {
-            get
-            {
-                return tape[tc];
-            }
-            set
-            {
-                tape[tc] = value;
-            }
-        }
 
         public void Run() 
         {
@@ -61,31 +31,31 @@ public void Run()
                 switch(instruction)
                 {
                 case '>': 
-                    MoveForward();
+                    _tape.MoveForward();
                     break;
                 case '<':
-                    MoveBackward();
+                    _tape.MoveBackward();
                     break;
                 case '+':
-                    Increment();
+                    _tape.Increment();
                     break;
                 case '-':
-                    Decrement();
+                    _tape.Decrement();
                     break;
                 case '.':
-                    Console.Write((char)Current);
+                    Console.Write((char)_tape.Current);
                     break;
                 case ',':
-                    Current = Console.Read();
+                    _tape.Current = Console.Read();
                     break;
                 case '[':
-                    if (Current == 0)
+                    if (_tape.Current == 0)
                     {
                         _program.JumpForward();
                     }
                         break;
                 case ']':
-                    if (Current != 0)
+                    if (_tape.Current != 0)
                     {
                         _program.JumpBackward();
                     }

csharp/BrainmessShort/Tape.cs

@@ -0,0 +1,43 @@
+using System;
+
+namespace BrainmessShort
+{
+    public class Tape
+    {
+        private readonly int[] tape = new int[5000];
+        private int tc = 2500;
+
+        public int MoveForward()
+        {
+            return tc++;
+        }
+
+        public int MoveBackward()
+        {
+            return tc--;
+        }
+
+        public int Increment()
+        {
+            return tape[tc]++;
+        }
+
+        public int Decrement()
+        {
+            return tape[tc]--;
+        }
+
+        public int Current
+        {
+            get
+            {
+                return tape[tc];
+            }
+            set
+            {
+                tape[tc] = value;
+            }
+        }
+    }
+}
+