fixes hacktoberfest17#883, implementing robot_simulator in C#

robot_simulator/c#/robot_simulator.cs

@@ -0,0 +1,83 @@
+using System;
+
+namespace robot_simulator
+{
+    class MainClass
+    {
+        public static void Main(string[] args)
+        {
+            Robot r = new Robot(7, 3, "north", "RAALAL");
+            r.run();
+        }
+    }
+
+    enum CardinalDirections {north, east, south, west}
+
+    class Robot
+    {
+        private int x { get; set; }
+        private int y { get; set; }
+        private CardinalDirections bearing { get; set; }
+        private string instructions { get; set; }
+
+        public Robot(int x0, int y0, string bearing, string instructions)
+        {
+            x = x0;
+            y = y0;
+            this.instructions = instructions;
+
+            if (bearing.ToLower().Equals("north"))
+                this.bearing = CardinalDirections.north;
+            else if (bearing.ToLower().Equals("east"))
+                this.bearing = CardinalDirections.east;
+            else if (bearing.ToLower().Equals("south"))
+                this.bearing = CardinalDirections.south;
+            else
+                this.bearing = CardinalDirections.west;
+        }
+
+        private void advance()
+        {
+            switch (bearing)
+            {
+                case CardinalDirections.north:
+                    y++;
+                    break;
+                case CardinalDirections.east:
+                    x++;
+                    break;
+                case CardinalDirections.south:
+                    y--;
+                    break;
+                case CardinalDirections.west:
+                    x--;
+                    break;
+            }
+        }
+
+        private void turn(char dir)
+        {
+            int currentBearing = (int)bearing;
+            if (dir == 'R' || dir == 'r')
+                bearing = (CardinalDirections)((currentBearing + 1) % 4);
+            else
+                bearing = (CardinalDirections)((currentBearing - 1) % 4);
+
+            if ((int)bearing < 0)
+                bearing = (CardinalDirections)((int)bearing + 4);
+        }
+
+        public void run()
+        {
+            foreach (char c in instructions)
+            {
+                if (c == 'A' || c == 'a')
+                    advance();
+                else
+                    turn(c);
+            }
+            Console.WriteLine("Final Position: (" + x + "," + y + ")");
+            Console.WriteLine("Final Bearing: " + bearing.ToString());
+        }
+    }
+}