The problem with including header files c++

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I have 3 header files in the project: Form1.h - this is header with implementation there, TaskModel.h with TaskModel.cpp, TaskController.h with TaskController.cpp.

There are content of files:

//-----
TaskController.h

#pragma once
#include "TaskModel.h"
..........

//----
Form1.h
#pragma once
#include "TaskModel.h"
#include "TaskController.h"
.........

The problem:

How to make Form1.h to be included to TaskModel.h. When I directly include, Form1.h to TaskModel.h then there are many errors. If to use forward declaration, how to organaize that ?

Posted 23-Jan-10 3:58am

Mishgun56

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Richard MacCutchan · Answer 1 · 2010-01-23T04:47:00

You should not need to include Form1.h in TaskModel.h when the latter is already include in the former. Too many cross dependencies such as you describe are an indication that your design may need to be restructured somewhat. However, without further information as to what is defined in each header file it is difficult to suggest how best to correct the problem.

Mishgun56 · Answer 2 · 2010-01-23T06:33:00

Solution 2

I've done it:

VB

// in TaskModel.h 
 
class Form1; // or other classes that are using in TaskModel.h 
 
//... task model code 
 
// in TaskModel.cpp 
 
#include "Form1.h"

Posted 23-Jan-10 6:33am