after following guide i'm not getting a result of the sum in results box this is my mainwindow.cpp if you can help as scratching my head all night am newbie to coding thanks.

// checksum 0xa193 version 0x30001
/*
This file was generated by the Mobile Qt Application wizard of Qt Creator.
MainWindow is a convenience class containing mobile device specific code
such as screen orientation handling.
It is recommended not to modify this file, since newer versions of Qt Creator
may offer an updated version of it.
*/

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QtCore/QCoreApplication>

MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent), ui(new Ui::MainWindow)
{
ui->setupUi(this);
}

MainWindow::~MainWindow()
{
delete ui;
}

void MainWindow::setOrientation(ScreenOrientation orientation)
{
#if defined(Q_OS_SYMBIAN)
// If the version of Qt on the device is < 4.7.2, that attribute won't work
if (orientation != ScreenOrientationAuto) {
const QStringList v = QString::fromAscii(qVersion()).split(QLatin1Char(' .'));
if (v.count() == 3 && (v.at(0).toInt() << 16 | v.at(1).toInt() << 8 | v.at(2).toInt()) < 0x040702) {
qWarning("Screen orientation locking only supported with Qt 4.7.2 and above");
return;
}
}
#endif // Q_OS_SYMBIAN

Qt::WidgetAttribute attribute;
switch (orientation) {
#if QT_VERSION < 0x040702
// Qt < 4.7.2 does not yet have the Qt::WA_*Orientation attributes
case ScreenOrientationLockPortrait:
attribute = static_cast<Qt::WidgetAttribute>(128);
break;
case ScreenOrientationLockLandscape:
attribute = static_cast<Qt::WidgetAttribute>(129);
break;
default:
case ScreenOrientationAuto:
attribute = static_cast<Qt::WidgetAttribute>(130);
break;
#else // QT_VERSION < 0x040702
case ScreenOrientationLockPortrait:
attribute = Qt::WA_LockPortraitOrientation;
break;
case ScreenOrientationLockLandscape:
attribute = Qt::WA_LockLandscapeOrientation;
break;
default:
case ScreenOrientationAuto:
attribute = Qt::WA_AutoOrientation;
break;
#endif // QT_VERSION < 0x040702
};
setAttribute(attribute, true);
}

void MainWindow::showExpanded()
{
#ifdef Q_OS_SYMBIAN
showFullScreen();
#elif defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)
showMaximized();
#else
show();
#endif
}

void MainWindow:n_sum_clicked()
{
int number1 = ui->number1->text().toInt();
int number2 = ui->number2->text().toInt();
int result = number1 + number2;
ui->sum->setText(QString::number(result));
}