chore: make G_state a private structure

* make G_state private
* move protected section behind private
* also do cleanup a little -> k and ctr won't exist as part of the
  generator outside of the G_state struct

generator.cpp

@@ -22,8 +22,6 @@ void Generator::initialize_generator(){
 	auto G = new Generator::G_state{};
 	G->k = 0;
 	G->ctr = 0;
-	k = 0;
-	ctr = 0;
 	printf("Generator initialized\n");
 	delete(G);
 };

generator.h

@@ -12,13 +12,8 @@ class Generator {
 public:
 	void initialize_generator();
 
-protected:
-	struct G_state;
-	auto get_state() -> Generator::G_state;
-
 private:
-	int64_t k;
-	unsigned __int128 ctr;
+	struct G_state;
 
 	auto reseed(const string& s) -> void;
 
@@ -31,6 +26,9 @@ private:
 	/* n is the number of random bytes to generate */
 	auto generate_random_data(uint n) -> string;
 
+protected:
+	auto get_state() -> Generator::G_state;
+
 }; // class generator
 
 } //namespace generator