在C ++引擎/框架构造中需要帮助解决链接器错误

时间:2013-10-27 06:26:11

标签: c++ linker-errors

我作为最后的手段来到这里,因为我需要帮助,因为明天将要分配一份作业。

我正在用C ++编写一个简单的引擎来处理节点,纹理/资产加载和状态系统。我想尝试继续编写资产相关的东西,但为了做到这一点,我需要州系统工作。

APPLICATION.h

#pragma once
#include "AppGSM\EGameStateManager.h"

class EGameStateManager;

class EApplication 
{
public:

    static void Init();
    static void RunApp(); 
    EGameStateManager* GetGameStateManager();


protected: 

    static int windowWidth;
    static int windowHeight;
    static bool fullScreen;
    static bool frameSync;
    static char* windowTitle;

};

目前每当我尝试使用上面看到的指针时,在我的teststate类和main.cpp中,我都会收到链接器错误。 (见下文)

TEST STATE.cpp

#include "AppGSM\ETestState.h"
#include "AppGSM\EApplication.h"
#include <iostream>

ETestState::ETestState(EApplication* pApp){}

ETestState::~ETestState(){}

void ETestState::Update(float deltaTime)
{
    //if(INPUT::GetKey(KEY_T))
    //{
    //  cout << "Entered Test State" << endl;
    //}

    m_testTimer += deltaTime;

    if(m_testTimer > 3.0f)
    {
        m_pApp->GetGameStateManager()->ChangeState("Second TEST");
    }
}

void ETestState::Draw(){}

的main.cpp

#include "GL\glew.h"
#include "GL\glfw.h"
#include <conio.h>
#include "AppGSM\EApplication.h"
#include "AppGSM\ETestState.h"

void main()
{
    EApplication::Init();

    EApplication* pApp = new EApplication();

    pApp->GetGameStateManager()->SetState("TEST", new ETestState(pApp));

    EApplication::RunApp();
}

这是基础游戏状态类,它包含在teststate中使用的应用程序指针:

BASEGAMESTATE.h

#pragma once 

class EApplication;
class EGameStateManager;

class EBaseGameState
{
public:

    EBaseGameState(){}
    EBaseGameState(EApplication* pApp);

    //always make the destructor virtual !!
    virtual ~EBaseGameState();

    //all game states must define update and draw
    virtual void Update(float deltaTime)    = 0;
    virtual void Draw()                     = 0;


protected:

    EApplication* m_pApp;


};

这些是链接器错误:

Error   9   error LNK2019: unresolved external symbol "public: class EGameStateManager * __thiscall EApplication::GetGameStateManager(void)" (?GetGameStateManager@EApplication@@QAEPAVEGameStateManager@@XZ) referenced in function _main  D:\Engine\main.obj

Error   10  error LNK2001: unresolved external symbol "public: class EGameStateManager * __thiscall EApplication::GetGameStateManager(void)" (?GetGameStateManager@EApplication@@QAEPAVEGameStateManager@@XZ)   D:\Engine\ETestState.obj

通常我会将链接器错误归结为循环包含,但我已经写下了各种类型的序列图,没有包含任何包含自身的内容。它可能是显而易见的......我真的很紧张。任何帮助将不胜感激。

1 个答案:

答案 0 :(得分:1)

链接器无法找到该功能。您需要实现GetGameStateManager()函数