First GameStates aproach

Author: JOGUI22

GameState.cpp

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+#include "GameState.h"
+
+GameState::GameState()
+{
+    //ctor
+}

GameState.h

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+#ifndef GAMESTATE_H
+#define GAMESTATE_H
+
+using namespace std;
+
+#include <string>
+
+class GameState //VIRTUAL class with GameState blueprint
+{
+    public:
+        GameState();
+
+        virtual void update() = 0;
+        virtual void render() = 0;
+
+        virtual bool onEnter() = 0; //like a load function
+        virtual bool onExit() = 0;  //like a clena function
+
+        virtual string getStateID() const = 0;
+    protected:
+    private:
+};
+
+#endif // GAMESTATE_H

MenuState.cpp

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+#include "MenuState.h"
+#include <iostream>
+using namespace std;
+
+const string MenuState::s_menuID = "MENU";
+
+MenuState::MenuState()
+{
+
+}
+
+string MenuState::getStateID() const
+{
+    return s_menuID;
+}
+
+void MenuState::update()
+{
+    //nothing for now
+}
+
+void MenuState::render()
+{
+    //nothig for now
+}
+
+bool MenuState::onEnter()
+{
+    cout << "entering MenuState" << endl;
+    return true;
+}
+
+bool MenuState::onExit()
+{
+    cout << "exiting MenuState" << endl;
+    return true;
+}

MenuState.h

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+#ifndef MENUSTATE_H
+#define MENUSTATE_H
+
+using namespace std;
+
+#include <string>
+#include "GameState.h"
+
+class MenuState : public GameState
+{
+    public:
+        MenuState();
+
+        virtual void update();
+        virtual void render();
+
+        virtual bool onEnter();
+        virtual bool onExit();
+
+        virtual string getStateID() const;
+    protected:
+    private:
+
+        static const string s_menuID;
+};
+
+#endif // MENUSTATE_H

PlayState.cpp

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+#include "PlayState.h"
+#include <iostream>
+
+using namespace std;
+
+PlayState::PlayState()
+{
+    //ctor
+}
+
+void PlayState::update()
+{
+    //nothing for now
+}
+
+void PlayState::render()
+{
+    //nothing for now
+}
+
+bool PlayState::onEnter()
+{
+    cout << "entering PlayState" << endl;
+    return true;
+}
+
+bool PlayState::onExit()
+{
+    cout << "exiting PlayState " << endl;
+    return true;
+}

PlayState.h

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+#ifndef PLAYSTATE_H
+#define PLAYSTATE_H
+
+using namespace std;
+
+#include "GameState.h"
+#include <string>
+
+
+class PlayState : public GameState
+{
+    public:
+        PlayState();
+        virtual void update();
+        virtual void render();
+
+        virtual bool onEnter();
+        virtual bool onExit();
+
+        virtual string getStateID() const;
+    protected:
+    private:
+
+        static const string s_playID;
+};
+
+#endif // PLAYSTATE_H