Merge branch 'set-robot' into 'master'

set robot on the map

See merge request mhart/DancingDroids!20

src/main.rs

@@ -14,6 +14,15 @@ impl World {
     fn create_map(&mut self) {
         self.map = vec!['.'; (self.x * self.y) as usize];
     }
+    /// Set robot on the map.
+    fn set_robot(&mut self, r: Robot) {
+        self.map[(r.p.x * r.p.y) as usize] = match r.o {
+            Orientation::N => '⬆',
+            Orientation::S => '⬇',
+            Orientation::E => '➡',
+            Orientation::W => '⬅',
+        }
+    }
 }
 
 /// Struct to store robot position.