I have a Qt application in which I want to put a restart button, but when it restarts I want it to automatically reconnect with my bluetooth device. here's my code:

Qt Code: 
  1. void gui::restartapp()
  2. {
  3.     int index_combo;
  4.  
  5.     index_combo= ui->devices_infile->currentIndex();
  6.  
  7.     QProcess::startDetached(QApplication::applicationFilePath());
  8.     exit(12);
  9.  
  10.     char *dest;
  11.     dest = addr_infile[index_combo];
  12.  
  13.     sock = linkup_directmain(dest, sock);
  14.  
  15.     if (sock != 0 && sock >0)
  16.     {
  17.         ui->console_1->setText("Connected to:");
  18.         ui->console_2->setText(name_infile[index_combo]);
  19.     }
  20.  
  21.     else if (sock == -1)
  22.     {
  23.         ui->console_1->setText("Error connecting");
  24.         ui->console_2->setText("Check device status");
  25.     }
  26. }
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but it only restarts. any idea?

Thank you in advance.