This makes no sense...

[sapslaj]

So I have this code...

#include <QtGui/QApplication>
#include "mainlogin.h"
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    mainlogin w;
    w.show();
    return app.exec();
}

#include <QtGui/QApplication>
#include "mainlogin.h"

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    mainlogin w;
    w.show();
    return app.exec();
}

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I get the compiler error:

main.cpp:10: error: expected '}' at end of input

main.cpp:10: error: expected '}' at end of input

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So this code works...

#include <QtGui/QApplication>
#include "mainlogin.h"
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    mainlogin w;
    w.show();
    return app.exec();
}}

#include <QtGui/QApplication>
#include "mainlogin.h"

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    mainlogin w;
    w.show();
    return app.exec();
}}

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Then I get this error:

moc_mainlogin.cpp:68: error: expected '}' at end of input

moc_mainlogin.cpp:68: error: expected '}' at end of input

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After I fix that, I get

c:\ndk_buildrepos\qt-desktop\src\winmain\qtmain_win.cpp:131: error: undefined reference to `qMain(int, char**)'

c:\ndk_buildrepos\qt-desktop\src\winmain\qtmain_win.cpp:131: error: undefined reference to `qMain(int, char**)'

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Is anyone else having this problem?

[Rachol]

Isn't it quite obvious, that you have something wrong in included file?

#include "mainlogin.h"

#include "mainlogin.h"

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Look for missing ";" or "}"

[FelixB]

Look for missing ";" or "}"

probably a missing ";" at the end of the class definition.

[sapslaj]

Checked the header... Do you guys see anything off?

#ifndef MAINLOGIN_H
#define MAINLOGIN_H
 
#include <QWidget>
#include <QDialog>
#include "mainwin.h"
 
namespace Ui {
    class mainlogin;
 
class mainlogin : public QDialog
{
    Q_OBJECT
 
public:
    explicit mainlogin(QWidget *parent = 0);
    ~mainlogin();
        QHBoxLayout *horizontalLayout_4;
        QSpacerItem *horizontalSpacer_3;
        QVBoxLayout *verticalLayout_3;
        QSpacerItem *verticalSpacer;
        QVBoxLayout *verticalLayout_2;
        QVBoxLayout *verticalLayout;
        QHBoxLayout *horizontalLayout;
        QLabel *label;
        QLineEdit *leUsername;
        QHBoxLayout *horizontalLayout_2;
        QLabel *label_2;
        QLineEdit *lePassword;
        QHBoxLayout *horizontalLayout_3;
        QSpacerItem *horizontalSpacer_2;
        QPushButton *bLogin;
        QSpacerItem *horizontalSpacer;
        QSpacerItem *verticalSpacer_2;
        QSpacerItem *horizontalSpacer_4;
 
        void setupUi(QDialog *mainlogin)
        {
            if (mainlogin->objectName().isEmpty())
                mainlogin->setObjectName(QString::fromUtf8("mainlogin"));
            mainlogin->resize(237, 117);
            horizontalLayout_4 = new QHBoxLayout(mainlogin);
            horizontalLayout_4->setObjectName(QString::fromUtf8("horizontalLayout_4"));
            horizontalSpacer_3 = new QSpacerItem(14, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
 
            horizontalLayout_4->addItem(horizontalSpacer_3);
 
            verticalLayout_3 = new QVBoxLayout();
            verticalLayout_3->setObjectName(QString::fromUtf8("verticalLayout_3"));
            verticalSpacer = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);
 
            verticalLayout_3->addItem(verticalSpacer);
 
            verticalLayout_2 = new QVBoxLayout();
            verticalLayout_2->setObjectName(QString::fromUtf8("verticalLayout_2"));
            verticalLayout = new QVBoxLayout();
            verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
            horizontalLayout = new QHBoxLayout();
            horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout"));
            label = new QLabel(mainlogin);
            label->setObjectName(QString::fromUtf8("label"));
 
            horizontalLayout->addWidget(label);
 
            leUsername = new QLineEdit(mainlogin);
            leUsername->setObjectName(QString::fromUtf8("leUsername"));
 
            horizontalLayout->addWidget(leUsername);
 
 
            verticalLayout->addLayout(horizontalLayout);
 
            horizontalLayout_2 = new QHBoxLayout();
            horizontalLayout_2->setObjectName(QString::fromUtf8("horizontalLayout_2"));
            label_2 = new QLabel(mainlogin);
            label_2->setObjectName(QString::fromUtf8("label_2"));
 
            horizontalLayout_2->addWidget(label_2);
 
            lePassword = new QLineEdit(mainlogin);
            lePassword->setObjectName(QString::fromUtf8("lePassword"));
 
            horizontalLayout_2->addWidget(lePassword);
 
 
            verticalLayout->addLayout(horizontalLayout_2);
 
 
            verticalLayout_2->addLayout(verticalLayout);
 
            horizontalLayout_3 = new QHBoxLayout();
            horizontalLayout_3->setObjectName(QString::fromUtf8("horizontalLayout_3"));
            horizontalSpacer_2 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
 
            horizontalLayout_3->addItem(horizontalSpacer_2);
 
            bLogin = new QPushButton(mainlogin);
            bLogin->setObjectName(QString::fromUtf8("bLogin"));
 
            horizontalLayout_3->addWidget(bLogin);
 
            horizontalSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
 
            horizontalLayout_3->addItem(horizontalSpacer);
 
 
            verticalLayout_2->addLayout(horizontalLayout_3);
 
 
            verticalLayout_3->addLayout(verticalLayout_2);
 
            verticalSpacer_2 = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);
 
            verticalLayout_3->addItem(verticalSpacer_2);
 
 
            horizontalLayout_4->addLayout(verticalLayout_3);
 
            horizontalSpacer_4 = new QSpacerItem(14, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
 
            horizontalLayout_4->addItem(horizontalSpacer_4);
 
 
            retranslateUi(mainlogin);
 
            QMetaObject::connectSlotsByName(mainlogin);
        } // setupUi
 
        void retranslateUi(QDialog *mainlogin)
        {
            mainlogin->setWindowTitle(QApplication::translate("mainlogin", "Dialog", 0, QApplication::UnicodeUTF8));
            label->setText(QApplication::translate("mainlogin", "Username:", 0, QApplication::UnicodeUTF8));
            label_2->setText(QApplication::translate("mainlogin", "Password:", 0, QApplication::UnicodeUTF8));
            bLogin->setText(QApplication::translate("mainlogin", "Login", 0, QApplication::UnicodeUTF8));
        } // retranslateUi
 
 
    void login()
    {
        QFile loginsFile("/logins.txt");
 
        if(loginsFile.size() == 0 || loginsFile.exists() == false)
        {
            QMessageBox error;
            error.setText("There are no logins stored. Please reinstall the program.");
            error.exec();
            return;
        }
        QTextStream loginsStream(&loginsFile);
 
        QString enteredUsername = ui->leUsername->text();
        QString enteredPassword = ui->lePassword->text();
 
        QString loadedLogins = loginsStream.readAll();
 
        int usernameCorrect = 0;
 
        QString filedUsername = loadedLogins.section("|", 1, 1);
        QString filedPassword = loadedLogins.section("|", 2, 2);
 
        QMessageBox debug;
            debug.setText(enteredUsername);
            debug.exec();
            debug.setText(enteredPassword);
            debug.exec();
            debug.setText(loadedLogins);
            debug.exec();
            debug.setText(filedUsername);
            debug.exec();
            debug.setText(filedPassword);
            debug.exec();
 
 
 
        if(enteredUsername != filedUsername)
        {
            QMessageBox error;
            error.setText("Username not found!");
            error.exec();
            usernameCorrect = 0;
        }
 
        else
        {
            if(enteredPassword == filedPassword)
            {
                mainwin *a = new mainwin;
                a->show();
            }
        }
    } // login()
 
 
private:
    Ui::mainlogin *ui;
}; // Class mainlogin
 
QT_END_NAMESPACE
 
#endif // MAINLOGIN_H

#ifndef MAINLOGIN_H
#define MAINLOGIN_H

#include <QWidget>
#include <QDialog>
#include "mainwin.h"

namespace Ui {
    class mainlogin;

class mainlogin : public QDialog
{
    Q_OBJECT

public:
    explicit mainlogin(QWidget *parent = 0);
    ~mainlogin();
        QHBoxLayout *horizontalLayout_4;
        QSpacerItem *horizontalSpacer_3;
        QVBoxLayout *verticalLayout_3;
        QSpacerItem *verticalSpacer;
        QVBoxLayout *verticalLayout_2;
        QVBoxLayout *verticalLayout;
        QHBoxLayout *horizontalLayout;
        QLabel *label;
        QLineEdit *leUsername;
        QHBoxLayout *horizontalLayout_2;
        QLabel *label_2;
        QLineEdit *lePassword;
        QHBoxLayout *horizontalLayout_3;
        QSpacerItem *horizontalSpacer_2;
        QPushButton *bLogin;
        QSpacerItem *horizontalSpacer;
        QSpacerItem *verticalSpacer_2;
        QSpacerItem *horizontalSpacer_4;

        void setupUi(QDialog *mainlogin)
        {
            if (mainlogin->objectName().isEmpty())
                mainlogin->setObjectName(QString::fromUtf8("mainlogin"));
            mainlogin->resize(237, 117);
            horizontalLayout_4 = new QHBoxLayout(mainlogin);
            horizontalLayout_4->setObjectName(QString::fromUtf8("horizontalLayout_4"));
            horizontalSpacer_3 = new QSpacerItem(14, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

            horizontalLayout_4->addItem(horizontalSpacer_3);

            verticalLayout_3 = new QVBoxLayout();
            verticalLayout_3->setObjectName(QString::fromUtf8("verticalLayout_3"));
            verticalSpacer = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);

            verticalLayout_3->addItem(verticalSpacer);

            verticalLayout_2 = new QVBoxLayout();
            verticalLayout_2->setObjectName(QString::fromUtf8("verticalLayout_2"));
            verticalLayout = new QVBoxLayout();
            verticalLayout->setObjectName(QString::fromUtf8("verticalLayout"));
            horizontalLayout = new QHBoxLayout();
            horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout"));
            label = new QLabel(mainlogin);
            label->setObjectName(QString::fromUtf8("label"));

            horizontalLayout->addWidget(label);

            leUsername = new QLineEdit(mainlogin);
            leUsername->setObjectName(QString::fromUtf8("leUsername"));

            horizontalLayout->addWidget(leUsername);


            verticalLayout->addLayout(horizontalLayout);

            horizontalLayout_2 = new QHBoxLayout();
            horizontalLayout_2->setObjectName(QString::fromUtf8("horizontalLayout_2"));
            label_2 = new QLabel(mainlogin);
            label_2->setObjectName(QString::fromUtf8("label_2"));

            horizontalLayout_2->addWidget(label_2);

            lePassword = new QLineEdit(mainlogin);
            lePassword->setObjectName(QString::fromUtf8("lePassword"));

            horizontalLayout_2->addWidget(lePassword);


            verticalLayout->addLayout(horizontalLayout_2);


            verticalLayout_2->addLayout(verticalLayout);

            horizontalLayout_3 = new QHBoxLayout();
            horizontalLayout_3->setObjectName(QString::fromUtf8("horizontalLayout_3"));
            horizontalSpacer_2 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

            horizontalLayout_3->addItem(horizontalSpacer_2);

            bLogin = new QPushButton(mainlogin);
            bLogin->setObjectName(QString::fromUtf8("bLogin"));

            horizontalLayout_3->addWidget(bLogin);

            horizontalSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

            horizontalLayout_3->addItem(horizontalSpacer);


            verticalLayout_2->addLayout(horizontalLayout_3);


            verticalLayout_3->addLayout(verticalLayout_2);

            verticalSpacer_2 = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding);

            verticalLayout_3->addItem(verticalSpacer_2);


            horizontalLayout_4->addLayout(verticalLayout_3);

            horizontalSpacer_4 = new QSpacerItem(14, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

            horizontalLayout_4->addItem(horizontalSpacer_4);


            retranslateUi(mainlogin);

            QMetaObject::connectSlotsByName(mainlogin);
        } // setupUi

        void retranslateUi(QDialog *mainlogin)
        {
            mainlogin->setWindowTitle(QApplication::translate("mainlogin", "Dialog", 0, QApplication::UnicodeUTF8));
            label->setText(QApplication::translate("mainlogin", "Username:", 0, QApplication::UnicodeUTF8));
            label_2->setText(QApplication::translate("mainlogin", "Password:", 0, QApplication::UnicodeUTF8));
            bLogin->setText(QApplication::translate("mainlogin", "Login", 0, QApplication::UnicodeUTF8));
        } // retranslateUi


    void login()
    {
        QFile loginsFile("/logins.txt");

        if(loginsFile.size() == 0 || loginsFile.exists() == false)
        {
            QMessageBox error;
            error.setText("There are no logins stored. Please reinstall the program.");
            error.exec();
            return;
        }
        QTextStream loginsStream(&loginsFile);

        QString enteredUsername = ui->leUsername->text();
        QString enteredPassword = ui->lePassword->text();

        QString loadedLogins = loginsStream.readAll();

        int usernameCorrect = 0;

        QString filedUsername = loadedLogins.section("|", 1, 1);
        QString filedPassword = loadedLogins.section("|", 2, 2);

        QMessageBox debug;
            debug.setText(enteredUsername);
            debug.exec();
            debug.setText(enteredPassword);
            debug.exec();
            debug.setText(loadedLogins);
            debug.exec();
            debug.setText(filedUsername);
            debug.exec();
            debug.setText(filedPassword);
            debug.exec();



        if(enteredUsername != filedUsername)
        {
            QMessageBox error;
            error.setText("Username not found!");
            error.exec();
            usernameCorrect = 0;
        }

        else
        {
            if(enteredPassword == filedPassword)
            {
                mainwin *a = new mainwin;
                a->show();
            }
        }
    } // login()


private:
    Ui::mainlogin *ui;
}; // Class mainlogin

QT_END_NAMESPACE

#endif // MAINLOGIN_H

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EDIT: Here is the other header:

#ifndef MAINWIN_H
#define MAINWIN_H
 
#include <QWidget>
#include <QtGui>
 
class mainwin : public QWidget
{
    Q_OBJECT
public:
    mainwin(QWidget *p = 0): QWidget(p)
    {
        setAttribute(Qt::WA_DeleteOnClose); // make sure memory is cleaned up
 
        // Temporary
        QVBoxLayout *layout = new QVBoxLayout;
        layout->addWidget( new QLabel("Label 1", this) );
        layout->addWidget( new QLabel("Label 2", this) );
        setLayout(layout);
    }
};
 
#endif // MAINWIN_H

#ifndef MAINWIN_H
#define MAINWIN_H

#include <QWidget>
#include <QtGui>

class mainwin : public QWidget
{
    Q_OBJECT
public:
    mainwin(QWidget *p = 0): QWidget(p)
    {
        setAttribute(Qt::WA_DeleteOnClose); // make sure memory is cleaned up

        // Temporary
        QVBoxLayout *layout = new QVBoxLayout;
        layout->addWidget( new QLabel("Label 1", this) );
        layout->addWidget( new QLabel("Label 2", this) );
        setLayout(layout);
    }
};

#endif // MAINWIN_H

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[squidge]

I see your using QT_END_NAMESPACE without a QT_BEGIN_NAMESPACE, so if the former resolves to null, then you'll be missing a '}' in that file.

[sapslaj]

Nevermind. It was just a bug, reinstalled Qt and rewrote most of the code. Everything is working on my side. Now its just all of the 300 errors of the Qt headers. Well, I do one error..

mainlogin.cpp:3: error: definition of implicitly-declared 'mainlogin::mainlogin(const mainlogin&)'

But I'm sure I know the fix for that. And I just cleared all of the Qt Errors. Rouge macros was to blame.

[Lykurg]

Ehm, what bug? The only bugs I can see are in your code... E.g. mainlogin.h line 10 misses a } for closing the namespace.

[sapslaj]

Ehm, what bug? The only bugs I can see are in your code... E.g. mainlogin.h line 10 misses a } for closing the namespace.

I see that now... The odd thing is that Qt Actually generated most of the code... So that's worrying.. Anyways, I fixed it. And now for my debugging problem...

Debugging starts
QWidget: Must construct a QApplication before a QPaintDevice
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.
Debugging has finished

#include <QApplication>
 
#include "mainwin.h"
 
int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    mainwin w;
    w.show();
    return app.exec();
}

#include <QApplication>

#include "mainwin.h"

int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    mainwin w;
    w.show();
    return app.exec();
}

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What do you guys think? Fail on my part or fail on the compilers fault?

[wysota]

Qt generates correct code. It's only when you try to "improve" that mistakes start to occur. Especially the code that has this nice warning about not modifying a file because it is autogenerated.

[sapslaj]

No really........... I'm not trying to improve that code, I just get Qt to generate some of the code, then I do the rest. I never touch anything else.

[squidge]

You still modified a file which is auto generated and not meant to be modified. I very much doubt UIC would have autogenerated the "login" method. It doesn't even belong in this class.

So you probably accidentally altered the file in such a way which caused the errors.

[wysota]

No really........... I'm not trying to improve that code, I just get Qt to generate some of the code, then I do the rest. I never touch anything else.

In C++ you usually "improve" code by subclassing.

[sapslaj]

Nevermind... Just wondering about my debugging problem. I never hit this problem before.