State machine, problems with #include - c++

Question

Hey Im trying to implement state machine for my game and I wanted to test some things out.
So right now my machine has 2 states Pause and Menu each one of them prints one texture and if I press mouse it should change to other state. That should be simple and I think I implemented it right, but I am having 40 bugs and I think its connetcted to include's. Here is how my code looks:
Game.h
#pragma once
#include <SFML/Graphics.hpp>
#include "GameState.h"
#include "Menu.h"
#include "Pause.h"
class Game
{
public:
sf::RenderWindow* window;
sf::Event evnt;
GameState *state; // current state
sf::Texture text1;
sf::Texture text2;
sf::Sprite sText1;
sf::Sprite sText2;
void start(); // Main loop
void print1(); // Prints one graphic
void print2(); // Prints second one
void update();// Prints based on current state
void handleInput(); // check for input
Game();
};
Game.cpp
void Game::start()
{
while (window->isOpen())
{
handleInput();
update();
window->clear();
window->display();
}
}
Game::Game()
{
window= new sf::RenderWindow(sf::VideoMode(1900, 1080), "SFML works!");
text1.loadFromFile("Test.png");
sText1.setTexture(text1);
text2.loadFromFile("background.png");
sText2.setTexture(text1);
state = new Menu();
}
void Game::print1()
{
window->draw(sText1);
}
void Game::update()
{
state->Update(*this);
}
void Game::print2()
{
window->draw(sText2);
}
void Game::handleInput()
{
while (window->pollEvent(evnt))
{
GameState* tmp = state->handleInput(evnt);
if (tmp != NULL)
{
delete state;
state = tmp;
}
}
}
GameState.h
#pragma once
#include "Game.h"
class GameState
{
protected:
public:
virtual void Update(Game &gra )=0;
virtual GameState* handleInput(sf::Event evnt)=0;
};
Pause.h
#pragma once
#include "GameState.h"
#include "Menu.h"
class Pause:public GameState
{
public:
void Update(Game& gra);
GameState* handleInput(sf::Event evnt);
};
Pause.cpp
#include "Pause.h"
void Pause::Update(Game& gra)
{
gra.print1();
}
GameState* Pause::handleInput(sf::Event evnt)
{
if (evnt.type == sf::Event::MouseButtonPressed)
{
return new Menu();
}
else
{
return NULL;
}
}
Menu class works the same, just returns Pause class
Here are the errors, doubt that they will help
Severity Code Description Project File Line Suppression State
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\GameState.h 11
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 9
Error C2660 'GameState::Update': function does not take 1 arguments sfml C:\Programowanie\Nauka\sfml\sfml\Game.cpp 52
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 9
Error C2504 'GameState': base class undefined sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 6
Error C2143 syntax error: missing ';' before '*' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 10
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 9
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 10
Error C2238 unexpected token(s) preceding ';' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 10
Error C2504 'GameState': base class undefined sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 6
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 9
Error C2143 syntax error: missing ';' before '*' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 10
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 10
Error C2238 unexpected token(s) preceding ';' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 10
Error C2143 syntax error: missing ';' before '*' sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C2238 unexpected token(s) preceding ';' sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C2504 'GameState': base class undefined sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 6
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 9
Error C2143 syntax error: missing ';' before '*' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 10
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 10
Error C2238 unexpected token(s) preceding ';' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 10
Error C2143 syntax error: missing ';' before '*' sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C2440 'return': cannot convert from 'Pause *' to 'GameState *' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.cpp 15
Error C2238 unexpected token(s) preceding ';' sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C2504 'GameState': base class undefined sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 6
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 9
Error C2143 syntax error: missing ';' before '*' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 10
Error C2238 unexpected token(s) preceding ';' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 10
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 10
Error C2143 syntax error: missing ';' before '*' sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C4430 missing type specifier - int assumed. Note: C++ does not support default-int sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C2238 unexpected token(s) preceding ';' sfml C:\Programowanie\Nauka\sfml\sfml\Game.h 11
Error C2440 'return': cannot convert from 'Menu *' to 'GameState *' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.cpp 14
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\GameState.h 11
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Pause.h 9
Error C2061 syntax error: identifier 'Game' sfml C:\Programowanie\Nauka\sfml\sfml\Menu.h 9

Answer 1

You have a circular dependency where Game.h includes Gamestate.h and vice versa. In the former you can replace your full include
#pragma once
#include <SFML/Graphics.hpp>
#include "GameState.h" // full include
#include "Menu.h"
#include "Pause.h"
class Game
{
...
with a forward declaration instead
#pragma once
#include <SFML/Graphics.hpp>
#include "Menu.h"
#include "Pause.h"
class GameState; // forward declaration
class Game
{
...
Then you can #include "GameState.h" within your Game.cpp file instead