Created a combat system to start with and also added a 'HEARING' mechanic where enemies can hear you from a certain distance before moving to you.

map.hpp

@@ -57,6 +57,7 @@ public:
   int limit() { return $limit; }
   size_t width() { return $walls[0].size(); }
   size_t height() { return $walls.size(); }
+  int distance(Point to) { return $paths[to.y][to.x]; }
   Room &room(size_t at) {
     return $rooms[at];
   }