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Thread: Weird problem

  1. #1
    Join Date
    Nov 2012
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    Qt products
    Qt4
    Platforms
    Windows

    Default Weird problem

    I have the following code in file mainwindow.h:

    Qt Code:
    1. #ifndef MAINWINDOW_H
    2. #define MAINWINDOW_H
    3.  
    4. #include <QMainWindow>
    5. #include "logindialog.h"
    6.  
    7. namespace Ui {
    8. class MainWindow;
    9. }
    10.  
    11. class MainWindow : public QMainWindow
    12. {
    13. Q_OBJECT
    14.  
    15. private:
    16. Ui::MainWindow *ui;
    17. LoginDialog *logindialog;
    18.  
    19. public:
    20. explicit MainWindow(QWidget *parent = 0);
    21. ~MainWindow();
    22.  
    23. private slots:
    24. void ALogin_Clicked();
    25. void LoginDialog_Destroyed();
    26.  
    27. };
    28.  
    29. #endif // MAINWINDOW_H
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    Other related files:
    logindialog.cpp
    logindialog.h
    mainwindow.cpp

    Everything works fine, until I put ANY changes into logindialog.cpp file. When I do, I get the following error in line 17:

    Qt Code:
    1. c:\users\mati\komunikator_klient_da_ze\mainwindow.h:17: błąd:C2143: syntax error : missing ';' before '*'
    2. c:\users\mati\komunikator_klient_da_ze\mainwindow.h:17: błąd:C4430: missing type specifier - int assumed. Note: C++ does not support default-int
    3. c:\users\mati\komunikator_klient_da_ze\mainwindow.h:17: błąd:C4430: missing type specifier - int assumed. Note: C++ does not support default-int
    To copy to clipboard, switch view to plain text mode 

    The problem can easily be fixed, by removing line 17, recompliling the project (which gives even more errors) and then putting that line back. Everything will work fine, until I change logindialog.cpp again.
    While it doesn't make it impossible to continue the project, it makes it very annoying...
    The IDE I use is QtCreator 2.4.1

    Could someone please help me?

  2. #2
    Join Date
    Sep 2011
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    Qt products
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    Default Re: Weird problem

    I don't know why you get that error. I have not experienced it before. I think this will help, though:

    In mainwindow.h dont use

    #include "LoginDialog.h"

    use

    class LoginDialog;


    use #include in the cpp
    Last edited by amleto; 23rd November 2012 at 21:56.
    If you have a problem, CUT and PASTE your code. Do not retype or simplify it. Give a COMPLETE and COMPILABLE example of your problem. Otherwise we are all guessing the problem from a fabrication where relevant details are often missing.

  3. The following user says thank you to amleto for this useful post:

    CactusPie (23rd November 2012)

  4. #3
    Join Date
    Nov 2012
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    Qt products
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    Platforms
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    Default Re: Weird problem

    Well, I'll be. Looks like that fixed the problem. I was almost certain that this problem will be too odd for anyone to know how to fix it Thanks a lot!!!

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