#ifndef ZOMBIE_STATE_H
#define ZOMBIE_STATE_H

#include "box2ddef.h"

namespace zombie {

	struct State {
		Position position_;
		Velocity velocity_;
		float angle_;
		float anglularVelocity_;
	};

}

#endif

#ifndef ZOMBIE_STATE_H
#define ZOMBIE_STATE_H

#include "box2ddef.h"

namespace zombie {

	struct State {
		Position position_{0, 0};
		Velocity velocity_{0, 0};
		float angle_{0.f};
		float anglularVelocity_{0.f};
	};

}

#endif

--- 
+++ 
@@ -6,10 +6,10 @@
 namespace zombie {
 
 	struct State {
-		Position position_{0, 0};
-		Velocity velocity_{0, 0};
-		float angle_{0.f};
-		float anglularVelocity_{0.f};
+		Position position_;
+		Velocity velocity_;
+		float angle_;
+		float anglularVelocity_;
 	};
 
 }
Make State struct a clean POD strcut
