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.

combat.cpp

@@ -0,0 +1,14 @@
+#include "combat.hpp"
+#include "rand.hpp"
+
+int Combat::fight(Combat &target) {
+  int attack = Random::uniform<int>(0,1);
+  int my_dmg = 0;
+
+  if(attack) {
+    my_dmg = Random::uniform<int>(1, damage);
+    target.hp -= my_dmg;
+  }
+
+  return my_dmg;
+}