[英]C++ header files including each other
I have 2 files that are both including the other file and I am getting strange errors. 我有2个文件,都包含另一个文件,并且出现了奇怪的错误。
#ifndef NODE_H
#define NODE_H
#include "model.h"
etc....
#endif
#ifndef MODEL_H
#define MODEL_H
#include "Node.h"
etc....
#endif
Here is my example code of what I am doing. 这是我在做什么的示例代码。 Can somebody explain to me why this is not possible or allowed? 有人可以向我解释为什么这不可能或不允许吗? And what I should do to get passed this problem. 我应该怎么做才能解决这个问题。
You have a circular dependency between Node
and model
. 您在Node
和model
之间具有循环依赖关系。
To deal with this, instead of... 为了解决这个问题,而不是...
#include "Node.h"
...in model.h , forward declare... ...在model.h中,向前声明...
class Node;
...and this will allow you to have Node& node;
...这将使您拥有Node& node;
in your Model
class
. 在您的Model
class
。
Or vice-versa. 或相反亦然。
Better still... see if you can revisit your design and eliminate this circular dependency. 更好的是……看看您是否可以重新设计并消除这种循环依赖。
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