Question

我已经在Stackoverflow中查找了这类问题的一些答案，其中没有一个能帮助我。 This问题描述了如何解决此错误，并且我应该提供定义而不仅仅是声明。我已经做到了，但我仍然收到以下错误：

错误13错误LNK2019：未解析的外部符号＆＃34;私有：__ thiscall NetworkManager :: NetworkManager（void）＆＃34; （?? 0NetworkManager @@ AAE @XZ）在函数＆＃34; public中引用：static class NetworkManager * __cdecl NetworkManager :: Instance（void）＆＃34; （？Instance @ NetworkManager @@ SAPAV1 @XZ）C：\ Users \ HIDDEN \ Documents \ AGK Projects \ C ++ Libraries \ apps \ template_windows_vs2013 \ NetworkManager.obj Template

以下是代码：

NetworkManager.h

#ifndef _H_NETWORKMANAGER_
#define _H_NETWORKMANAGER_

#include<iostream>
#include<vector>

class NetworkManager
{
private:
    NetworkManager();
    static NetworkManager * netManager;
public:
    int networkID;
    static NetworkManager * Instance();
    int HostNetwork(std::string netName, std::string hostName, int port);
    int JoinNetwork(std::string netName, std::string clientName);
    bool IsNetworkActive(int netID);
};

#endif

NetworkManager.cpp

#include<iostream>
#include "NetworkManager.h"
#include "template.h"

NetworkManager * NetworkManager::netManager = NULL;

NetworkManager * NetworkManager::Instance()
{
    if (!netManager)
        netManager = new NetworkManager;

    return netManager;
}

int NetworkManager::HostNetwork(std::string netName, std::string hostName, int port)
{
    int networdID__;
    const char * netName__ = netName.c_str();
    const char * hostName__ = hostName.c_str();
    networdID__ = agk::HostNetwork(netName__, hostName__, port);
    return networdID__;
}

int NetworkManager::JoinNetwork(std::string netName, std::string clientName)
{
    int networdID__;
    const char * netName__ = netName.c_str();
    const char * clientName__ = clientName.c_str();
    networdID__ = agk::JoinNetwork(netName__, clientName__);
    return networdID__;
}

bool NetworkManager::IsNetworkActive(int netID)
{
    switch (agk::IsNetworkActive(netID))
    {
    case 0: return false; break;
    case 1: return true;  break;
    }
}

Answer 1

您在头文件中声明了NetworkManager::NetworkManager()，但源文件中没有实现它。

未解析的外部符号（单例类C ++）

1 个答案: