具有引用彼此的成员的C ++类 [英] C++ classes with members referencing each other

问题描述

我试图用引用彼此的成员写2个类。我不知道如果我做错了，或者这是不可能的。任何人都可以在这里帮助我...

I'm trying to write 2 classes with members that reference each other. I'm not sure if I'm doing something wrong or it's just not possible. Can anyone help me out here...

Source.cpp

#include "Headers.h"
using namespace std;

void main()
{
    Network* network = new Network();

    system("pause");
    return;
}

Headers.h
$ b

Headers.h

#ifndef Headers_h
#define Headers_h

#include <iostream>
#include <vector>
#include "Network.h"
#include "Router.h"

#endif

Network.h

#include "Headers.h"

class Network
{
protected:
    vector<Router> Routers;
};

Router.h

#include "Headers.h"

class Router
{
protected:
    Network* network;
public:
};

我遇到的错误是：

错误C2143：语法错误：缺少';'before'<'

错误C2238：';'之前的意外标记

错误C4430：缺少类型说明符 - int。

error C2143: syntax error : missing ';' before '<'
error C2238: unexpected token(s) preceding ';'
error C4430: missing type specifier - int assumed.

我确定我没有遗漏任何分号或类似的东西。程序工作发现如果我拿出其中的一个成员。我尝试找到类似的问题，解决方案是使用指针，但这是我正在做，它似乎无法工作！

I'm pretty sure I'm not missing any semicolons or stuff like that. The program works find if I take out one of the members. I tried finding similar questions and the solution was to use pointers, but that's what I'm doing and it does't seem to be working!

推荐答案

第一个错误 - 您需要明确使用命名空间：

first error - you need to explicitly use the namespace:

std::vector<Router> Routers;

不要使用namespace std;在头文件中

Don't "use namespace std;" in header files

其他错误从第一个开始重新生成：）

Other errors are restulting from the first :)

以后，你需要做向前宣布的Router类，put

As to the referencing to the class defined later, you need to do forward declaration of Router class, put

class Router;

加入您的Network.h

into your Network.h

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