Getting main window to run.

[Doug Broadwell]

I have created a Main Window app in Designer and run qmake to get the ui_n1.h file created. I have subclassed my Main Window object to place my functionality in it. My n1.h file is:

class MainWindow : public QMainWindow, public Ui::MainWindow {
 
    Q_OBJECT
 
public:
 
    MainWindow();
};

class MainWindow : public QMainWindow, public Ui::MainWindow {

    Q_OBJECT

public:

    MainWindow();
};

To copy to clipboard, switch view to plain text mode 

My MainWindow.cpp file is:

#include <QtGui>
#include "n1.h"
 
MainWindow::MainWindow() : QMainWindow() {
 
    setupUi(this);
}

#include <QtGui>
#include "n1.h"

MainWindow::MainWindow() : QMainWindow() {

    setupUi(this);
}

To copy to clipboard, switch view to plain text mode 

My main.cpp is:

#include <QApplication>
#include "n1.h"
 
int main(int argc, char *argv[]) {
 
    QApplication app(argc, argv);
    MainWindow *mainwindow = new MainWindow;
    mainwindow->show();
    return app.exec();
}

#include <QApplication>
#include "n1.h"

int main(int argc, char *argv[]) {

    QApplication app(argc, argv);
    MainWindow *mainwindow = new MainWindow;
    mainwindow->show();
    return app.exec();
}

To copy to clipboard, switch view to plain text mode 

Does this seem right? When I run it nothing happens (or it opens and immediatly closes??).

Thanks

Update! Added code tags.