so i'm trying to implement some menus into my programs -- i have to be doing it the hard way. Here's my code in its entirety ... please, someone tell me there's an easier way!

Qt Code: 
  1. #ifndef JAUS_H
  2. #define JAUS_H
  3.  
  4. #include <QMainWindow>
  5. #include <QVBoxLayout>
  6.  
  7. namespace Ui {
  8.     class jaus;
  9. }
  10.  
  11. class jaus : public QMainWindow {
  12.     Q_OBJECT
  13. public:
  14.     jaus();
  15.     ~jaus();
  16.  
  17. protected:
  18.     void changeEvent(QEvent *e);
  19.     void contextMenuEvent(QContextMenuEvent *event);
  20.  
  21. private:
  22.     Ui::jaus *ui;
  23.  
  24.     void createActions();
  25.     void createMenus();
  26.  
  27.     QMenu *fileMenu;
  28.     QMenu *dataMenu;
  29.     QMenu *helpMenu;
  30.     QAction *exitAct;
  31.     QAction *startLogAct;
  32.     QAction *stopLogAct;
  33.     QAction *debugAct;
  34.     QAction *aboutAct;
  35.  
  36. private slots:
  37.     void exit();
  38.     void startLog();
  39.     void stopLog();
  40.     void debug();
  41.     void about();
  42.  
  43. };
  44.  
  45. #endif // JAUS_H
  46.  
  47.  
  48.  
  49. #include "jaus.h"
  50. #include "ui_jaus.h"
  51.  
  52. jaus::jaus()
  53. {
  54.     QWidget *widget = new QWidget;
  55.     setCentralWidget(widget);
  56.  
  57.     QWidget *topFiller = new QWidget;
  58.     topFiller->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  59.  
  60.     QWidget *bottomFiller = new QWidget;
  61.     bottomFiller->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
  62.  
  63.     QVBoxLayout *layout = new QVBoxLayout;
  64.     layout->setMargin(5);
  65.     layout->addWidget(topFiller);
  66.     layout->addWidget(bottomFiller);
  67.     widget->setLayout(layout);
  68.  
  69.     createActions();
  70.     createMenus();
  71.  
  72.     QString message = tr("JAUS Communicator - Version 0.1");
  73.     statusBar()->showMessage(message);
  74. }
  75.  
  76.  
  77. jaus::~jaus()
  78. {
  79.     delete ui;
  80. }
  81.  
  82. void jaus::changeEvent(QEvent *e)
  83. {
  84.     QMainWindow::changeEvent(e);
  85.     switch (e->type()) {
  86.     case QEvent::LanguageChange:
  87.         ui->retranslateUi(this);
  88.         break;
  89.     default:
  90.         break;
  91.     }
  92. }
  93.  
  94. void jaus::createActions()
  95. {
  96.     exitAct = new QAction(tr("&Exit"), this);
  97.     exitAct->setStatusTip(tr("Exit the application"));
  98.     connect(exitAct, SIGNAL(triggered()), this, SLOT(exit()));
  99.  
  100.     startLogAct = new QAction(tr("&Logging"), this);
  101.     startLogAct->setStatusTip(tr("Enables Logging"));
  102.     connect(startLogAct, SIGNAL(triggered()), this, SLOT(startLog()));
  103.  
  104.     debugAct = new QAction(tr("&Debug"), this);
  105.     debugAct->setStatusTip(tr("Turns Debugging On"));
  106.     connect(debugAct, SIGNAL(triggered()), this, SLOT(debug()));
  107.  
  108.     aboutAct = new QAction(tr("&About"), this);;
  109.     connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
  110. }
  111.  
  112. void jaus::createMenus()
  113. {
  114.     fileMenu = menuBar()->addMenu(tr("&File"));
  115.     fileMenu->addAction(exitAct);
  116.     fileMenu->addSeparator();
  117.  
  118.     dataMenu = menuBar()->addMenu(tr("&Data"));
  119.     dataMenu->addAction(startLogAct);
  120.     dataMenu->addAction(debugAct);
  121.     dataMenu->addSeparator();
  122.  
  123.     helpMenu = menuBar()->addMenu(tr("&Help"));
  124.     helpMenu->addAction(aboutAct);
  125. }
  126.  
  127. void jaus::about()
  128. {
  129.  
  130. }
  131.  
  132. void jaus::exit()
  133. {
  134.  
  135. }
  136.  
  137. void jaus::debug()
  138. {
  139.  
  140. }
  141.  
  142.  
  143. void jaus::startLog()
  144. {
  145.  
  146. }
  147.  
  148. void jaus::stopLog()
  149. {
  150.  
  151. }
  152.  
  153.  
  154.  
  155. #include <QtGui/QApplication>
  156. #include "jaus.h"
  157.  
  158. int main(int argc, char *argv[])
  159. {
  160.     QApplication a(argc, argv);
  161.     jaus w;
  162.     w.show();
  163.     return a.exec();
  164. }
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When I compile this code I get the collect2: ld returned 1 exit status error message. I have no clue what this means, but hopefully I can find an easier way (maybe a drag/drop option??) to add menus to my programs. Thanks for any help!!