小编Tal*_*r T的帖子

我不明白为什么我得到这个编译错误:

error C2027: use of undefined type 'GameState'
note: see declaration of 'GameState'
error C2338: can't delete an incomplete type warning C4150: deletion of pointer to incomplete type 'GameState'; no destructor called

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这是相关代码:

#pragma once
#include <SFML\Graphics.hpp>
#include "SpawnManager.h"
#include "Resource.h"
#include <stack>
#include <memory>
class GameState;

class Controller
{
public:
    Controller();
    void run();
    void setPlayerScore(unsigned score);
    sf::RenderWindow& getWindow() { return m_window; }
    void addState(const States& state);
    void changeState(const States& state);
    GameState* getState() const;
    void popState();
    void add_state(const States& type, …