Hello! I use Qt5. My problem is nex: i want to send a signal from file "Scene"

Scene.h

Qt Code: 
  1. signals:
  2.     void signalShowStatus( const int & );
  3.  
  4. private:
  5.     void sendStatus();
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Scene.cpp

Qt Code: 
  1. void Scene::sendStatus()
  2. {
  3.    int N = m_game.segment();\\ m_game.segment() steadily increasing
  4.    emit signalShowStatus( N );
  5. }
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to file "mainwindow"

mainwindow.h

Qt Code: 
  1. private slots:
  2.     void slotSetStatus( const int &N );
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mainwindow.cpp

Qt Code: 
  1. MainWindow::MainWindow(QWidget *parent) :
  2.     QMainWindow(parent),
  3.     ui(new Ui::MainWindow)
  4. {
  5.     connect( ui->widget , SIGNAL( signalShowStatus( int ) ),
  6.             this, SLOT( slotSetStatus( int ) ) );
  7. }
  8.  
  9. void MainWindow::slotSetStatus( const int &N )
  10. {
  11.  
  12.     ui->lcdnumber->display( N );
  13.  
  14. }
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Without fault, but does not count on widget. Where did I go wrong?
Thanks)