Problem displaying my main window

[Salazaar]

Right. Than, I have a question concerning code that jpn gave me:

#include "ui_Maker.h"
 
 
 
      int main(int argc, char *argv[])
 
       {
 
           QApplication app(argc, argv);
 
           QMainWindow *window = new QMainWindow; // create a main window, that's what you have designed
 
           Ui::MainWindow ui;
 
           ui.setupUi(window);
 
           window->show();
 
           return app.exec();
 
      }

#include "ui_Maker.h"
   
       
  
      int main(int argc, char *argv[])
  
       {
   
           QApplication app(argc, argv);
   
           QMainWindow *window = new QMainWindow; // create a main window, that's what you have designed
  
           Ui::MainWindow ui;
  
           ui.setupUi(window);
  
           window->show();
 
           return app.exec();

      }

To copy to clipboard, switch view to plain text mode 

Why it's

Ui::MainWindow ui

Ui::MainWindow ui

To copy to clipboard, switch view to plain text mode 

? I didn't find anything what should be called by this.