7 files changed, 33 insertions, 15 deletions

diff --git a/include/alien.h b/include/alien.h
index 2f7d596..5dda726 100644
--- a/include/alien.h
+++ b/include/alien.h
@@ -1,10 +1,11 @@
 #pragma once
 
-class Alien {
+#include "game_entity.h"
+
+class Alien : public GameEntity
+{
 public:
     Alien(int x, int y);
     const static char MAP_CHAR = 'x';
 private:
-    int x;
-    int y;
 };
diff --git a/include/enemy_bullet.h b/include/enemy_bullet.h
index db3fcf9..ff3b001 100644
--- a/include/enemy_bullet.h
+++ b/include/enemy_bullet.h
@@ -1,11 +1,12 @@
 #pragma once
 
-class EnemyBullet {
+#include "game_entity.h"
+
+class EnemyBullet: public GameEntity
+{
 public:
     EnemyBullet(int x, int y);
     const static char ALIEN_MAP_CHAR = '|';
     const static char ENEMY_MISSILE_MAP_CHAR = 'i';
 private:
-    int x;
-    int y;
 };
diff --git a/include/game_entity.h b/include/game_entity.h
new file mode 100644
index 0000000..215333c
--- /dev/null
+++ b/include/game_entity.h
@@ -0,0 +1,13 @@
+#pragma once
+
+class GameEntity
+{
+public:
+    GameEntity(int x, int y);
+    int x() const {return _x;}
+    int y() const {return _y;}
+private:
+    int _x;
+    int _y;
+};
+
diff --git a/include/game_state.h b/include/game_state.h
index defe691..db20b84 100644
--- a/include/game_state.h
+++ b/include/game_state.h
@@ -12,6 +12,7 @@ class GameState
 {
 public:
     GameState(std::string mapFilename);
+    void logState();
 private:
     std::vector<Alien> aliens;
     std::vector<EnemyBullet> bullets;
diff --git a/include/player_missile.h b/include/player_missile.h
index 6f304df..c504a79 100644
--- a/include/player_missile.h
+++ b/include/player_missile.h
@@ -1,11 +1,11 @@
 #pragma once
 
-class PlayerMissile
+#include "game_entity.h"
+
+class PlayerMissile: public GameEntity
 {
 public:
     PlayerMissile(int x, int y);
     const static char MAP_CHAR = '!';
 private:
-    int x;
-    int y;
 };
diff --git a/include/shield.h b/include/shield.h
index bd64e3e..be65be3 100644
--- a/include/shield.h
+++ b/include/shield.h
@@ -1,11 +1,12 @@
 #pragma once
 
-class Shield {
+#include "game_entity.h"
+
+class Shield: public GameEntity
+{
 public:
     Shield(int x, int y);
     const static char MAP_CHAR = '-';
 private:
-    int x;
-    int y;
 };
 
diff --git a/include/spaceship.h b/include/spaceship.h
index 5e6afd0..bd26b64 100644
--- a/include/spaceship.h
+++ b/include/spaceship.h
@@ -1,11 +1,12 @@
 #pragma once
 
-class Spaceship {
+#include "game_entity.h"
+
+class Spaceship: public GameEntity
+{
 public:
     Spaceship(int x, int y);
     const static char ENEMY_MAP_CHAR = 'V';
     const static char PLAYER_MAP_CHAR = 'A';
 private:
-    int x;
-    int y;
 };