Does not define type

[Atomic_Sheep]

I have one class:

field.h

#ifndef FIELD_H
#define FIELD_H
 
class Field : public QWidget
etc
 
#endif

#ifndef FIELD_H
#define FIELD_H

class Field : public QWidget
etc

#endif

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And then I have another class that uses this class as composition:

Page.h

#ifndef PAGE_H
#define PAGE_H
 
#include "field.h"
 
class Page : public QWidget
{
    Field array[10];
}
 
#endif

#ifndef PAGE_H
#define PAGE_H

#include "field.h"

class Page : public QWidget
{
    Field array[10];
}

#endif

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At compile I get the error of 'Field' does not name a type, I don't know how to fix this? Internet seems to spring up a lot of circular includes as being the culprit however I don't understand how this is the case given that this is composition and I've got all my includes all up and running and it seems to work here:

http://www.learncpp.com/cpp-tutorial/102-composition/

!!!!!!!!!!!!!!!!!!!!!!!!! << sorry coding a line a week is frustrating. Every time something is added, a new error comes about and it's just beyond frustrating. Programing isn't my forte I don't think.

[Atomic_Sheep]

field.h

#ifndef FIELD_H
#define FIELD_H
 
#include <QWidget>
#include <QMessageBox>
#include <QDebug>
#include <QString>
#include <iostream>
#include <string>
 
class Field : public QWidget
{
    Q_OBJECT
public:
    explicit Field(QWidget *parent = 0);
 
    int m_iRow;
    int m_iColumn;
    std::string m_sText;
    int m_iColour;
 
    void SetColour(int iColour);
    char FieldText();
};
 
#endif

#ifndef FIELD_H
#define FIELD_H

#include <QWidget>
#include <QMessageBox>
#include <QDebug>
#include <QString>
#include <iostream>
#include <string>

class Field : public QWidget
{
    Q_OBJECT
public:
    explicit Field(QWidget *parent = 0);

    int m_iRow;
    int m_iColumn;
    std::string m_sText;
    int m_iColour;

    void SetColour(int iColour);
    char FieldText();
};

#endif

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page.h

#ifndef PAGE_H
#define PAGE_H
 
#include <QWidget>
 
#include <iostream>
#include <string>
 
#include "field.h"
#include "selectablefield.h"
#include "editablefield.h"
 
class Page : public QWidget
{
    Q_OBJECT
public:
    explicit Page(QWidget *parent = 0);
 
    Page()
    {}
 
    Field m_anField[220];
 
signals:
 
public slots:
 
};
 
#endif

#ifndef PAGE_H
#define PAGE_H

#include <QWidget>

#include <iostream>
#include <string>

#include "field.h"
#include "selectablefield.h"
#include "editablefield.h"

class Page : public QWidget
{
    Q_OBJECT
public:
    explicit Page(QWidget *parent = 0);

    Page()
    {}

    Field m_anField[220];

signals:

public slots:

};

#endif

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Error that I get is:

\page.h:39: error: 'Field' does not name a type

compile output is:

In file included from ../mainwindow.h:6,
/field.h:13,
from \field.cpp:1:
/page.h:39: error: 'Field' does not name a type
mingw32-make[1]: Leaving directory `D:/Users/...
mingw32-make[1]: *** [debug/field.o] Error 1
mingw32-make: *** [debug] Error 2
The process "D:\QtSDK\mingw\bin\mingw32-make.exe" exited with code 2.
Error while building project ... (target: Desktop)
When executing build step 'Make'

[ChrisW67]

What does the top of field.cpp look like? Is it really in the root directory of you drive as this would imply?

In file included from ../mainwindow.h:6,
/field.h:13,
from \field.cpp:1:  <<<<< here

In file included from ../mainwindow.h:6,
/field.h:13,
from \field.cpp:1:  <<<<< here

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Is everything in the same directory?
Is there more than one file called "field.h" in your project?

[Atomic_Sheep]

Found the error, you were pretty close from what I can gather. I had an #include field.h in my main.cpp file and for some reason that was what was causing the issue. I'm not sure why this was the case given that I was using header guards.

[wysota]

Your code is invalid -- widgets cannot be copied thus you shouldn't have an array of Field objects. Instead you can have an array of Field pointers.