SunState Pattern was added.

Author: khajavi

Behavioural/State/SunState/Main.cpp

@@ -0,0 +1,101 @@
+#include <iostream>
+using namespace std;
+
+class Sun;
+
+class State {
+public:
+	virtual void nextState( Sun* sun ) = 0;
+	virtual const char* toString() = 0;
+};
+
+class Bamdad : public State {
+public:
+	virtual void nextState( Sun* sun );
+	virtual const char* toString() {
+		return "Bamdad";
+	}
+};
+
+class Chasht : public State {
+public:
+	virtual void nextState( Sun* sun );
+	virtual const char* toString() {
+		return "Chasht";
+	}
+};
+
+class Shamgah : public State {
+public:
+	virtual void nextState( Sun* sun );
+	virtual const char* toString() {
+		return "Shamgah";
+	}
+};
+
+class Shabangah : public State {
+public:
+	virtual void nextState( Sun* sun );
+	virtual const char* toString() {
+		return "Shabangah";
+	}
+};
+
+class Sun {
+public:
+	Sun( State* state )
+		:_state( state ) {
+	}
+
+	void afterSixHours() {
+		_state->nextState( this );
+	}
+	
+	void changeState( State* state ) {
+		_state = state;
+	}
+
+	const char* getState() {
+		return _state->toString();
+	}
+
+private:
+	State* _state;
+};
+
+void Bamdad::nextState( Sun* sun ) {
+	sun->changeState( new Chasht() );
+}
+
+void Chasht::nextState( Sun* sun ) {
+	sun->changeState( new Shamgah() );
+}
+
+void Shamgah::nextState( Sun* sun ) {
+	sun->changeState( new Shabangah() );
+}
+
+void Shabangah::nextState( Sun* sun ) {
+	sun->changeState( new Bamdad() );
+}
+
+int main() {
+
+	Sun* sun = new Sun( new Bamdad() );
+	sun->afterSixHours();
+	cout << sun->getState() << endl;
+
+	sun->afterSixHours();
+	cout << sun->getState() << endl;
+
+	sun->afterSixHours();
+	cout << sun->getState() << endl;
+
+	sun->afterSixHours();
+	cout << sun->getState() << endl;
+
+	sun->afterSixHours();
+	cout << sun->getState() << endl;
+
+	return 0;
+}