Probleme compilation Qt avec fichiers .ui

#include <QApplication>
#include <QtGui>
#include "ui_MainWindow.h"
#include "MainWindow.cpp"

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     QWidget *widget = new QWidget;
     Ui::CalculatorForm ui;
     ui.setupUi(widget);

     widget->show();
     return app.exec();
 }

#include <QApplication>
#include <QtGui>
#include "ui_MainWindow.h"
#include "MainWindow.cpp"

 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     QWidget *widget = new QWidget;
     Ui::CalculatorForm ui;
     ui.setupUi(widget);

     widget->show();
     return app.exec();
 }

/********************************************************************************
** Form generated from reading ui file 'MainWindow.ui'
**
** Created: Mon 13. Apr 19:32:35 2009
**      by: Qt User Interface Compiler version 4.5.0
**
** WARNING! All changes made in this file will be lost when recompiling ui file!
********************************************************************************/

#ifndef UI_MAINWINDOW_H
#define UI_MAINWINDOW_H

#include <QtCore/QVariant>
#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QButtonGroup>
#include <QtGui/QDial>
#include <QtGui/QHeaderView>
#include <QtGui/QMainWindow>
#include <QtGui/QMenu>
#include <QtGui/QMenuBar>
#include <QtGui/QProgressBar>
#include <QtGui/QSlider>
#include <QtGui/QStatusBar>
#include <QtGui/QWidget>

QT_BEGIN_NAMESPACE

class Ui_MainWindow
{
public:
    QAction *actionExit;
    QWidget *centralwidget;
    QSlider *horizontalSlider;
    QProgressBar *progressBar;
    QDial *dial;
    QProgressBar *progressBar_2;
    QMenuBar *menubar;
    QMenu *menuFiles;
    QStatusBar *statusbar;

    void setupUi(QMainWindow *MainWindow)
    {
        if (MainWindow->objectName().isEmpty())
            MainWindow->setObjectName(QString::fromUtf8("MainWindow"));
        MainWindow->resize(512, 325);
        MainWindow->setDocumentMode(false);
        MainWindow->setTabShape(QTabWidget::Rounded);
        actionExit = new QAction(MainWindow);
        actionExit->setObjectName(QString::fromUtf8("actionExit"));
        centralwidget = new QWidget(MainWindow);
        centralwidget->setObjectName(QString::fromUtf8("centralwidget"));
        horizontalSlider = new QSlider(centralwidget);
        horizontalSlider->setObjectName(QString::fromUtf8("horizontalSlider"));
        horizontalSlider->setGeometry(QRect(100, 30, 291, 19));
        horizontalSlider->setMaximum(100);
        horizontalSlider->setOrientation(Qt::Horizontal);
        progressBar = new QProgressBar(centralwidget);
        progressBar->setObjectName(QString::fromUtf8("progressBar"));
        progressBar->setGeometry(QRect(100, 80, 341, 23));
        progressBar->setValue(0);
        progressBar->setTextVisible(true);
        dial = new QDial(centralwidget);
        dial->setObjectName(QString::fromUtf8("dial"));
        dial->setGeometry(QRect(180, 150, 50, 64));
        dial->setStyleSheet(QString::fromUtf8("background-color: qradialgradient(spread:repeat, cx:0.5, cy:0.5, radius:0.077, fx:0.5, fy:0.5, stop:0 rgba(0, 169, 255, 147), stop:0.497326 rgba(0, 0, 0, 147), stop:1 rgba(0, 169, 255, 147));\n"
"color: qconicalgradient(cx:0, cy:0, angle:135, stop:0 rgba(255, 255, 0, 69), stop:0.375 rgba(255, 255, 0, 69), stop:0.423533 rgba(251, 255, 0, 145), stop:0.45 rgba(247, 255, 0, 208), stop:0.477581 rgba(255, 244, 71, 130), stop:0.518717 rgba(255, 218, 71, 130), stop:0.55 rgba(255, 255, 0, 255), stop:0.57754 rgba(255, 203, 0, 130), stop:0.625 rgba(255, 255, 0, 69), stop:1 rgba(255, 255, 0, 69));"));
        dial->setMaximum(100);
        progressBar_2 = new QProgressBar(centralwidget);
        progressBar_2->setObjectName(QString::fromUtf8("progressBar_2"));
        progressBar_2->setGeometry(QRect(100, 210, 341, 23));
        progressBar_2->setValue(0);
        progressBar_2->setTextVisible(true);
        MainWindow->setCentralWidget(centralwidget);
        menubar = new QMenuBar(MainWindow);
        menubar->setObjectName(QString::fromUtf8("menubar"));
        menubar->setGeometry(QRect(0, 0, 512, 22));
        menuFiles = new QMenu(menubar);
        menuFiles->setObjectName(QString::fromUtf8("menuFiles"));
        MainWindow->setMenuBar(menubar);
        statusbar = new QStatusBar(MainWindow);
        statusbar->setObjectName(QString::fromUtf8("statusbar"));
        MainWindow->setStatusBar(statusbar);

        menubar->addAction(menuFiles->menuAction());
        menuFiles->addAction(actionExit);

        retranslateUi(MainWindow);
        QObject::connect(horizontalSlider, SIGNAL(sliderMoved(int)), progressBar, SLOT(setValue(int)));
        QObject::connect(dial, SIGNAL(valueChanged(int)), progressBar_2, SLOT(setValue(int)));
        QObject::connect(actionExit, SIGNAL(activated()), MainWindow, SLOT(close()));

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

    void retranslateUi(QMainWindow *MainWindow)
    {
        MainWindow->setWindowTitle(QApplication::translate("MainWindow", "Test", 0, QApplication::UnicodeUTF8));
        actionExit->setText(QApplication::translate("MainWindow", "Exit", 0, QApplication::UnicodeUTF8));
        menuFiles->setTitle(QApplication::translate("MainWindow", "Files", 0, QApplication::UnicodeUTF8));
    } // retranslateUi

};

namespace Ui {
    class MainWindow: public Ui_MainWindow {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_MAINWINDOW_H