Initialize a progress bar in C++

[Chrisch]

I want to make a button and a bar pogression, when I click on the button bar or initialize a new bar it returns to 0%.Here is my code, but "the program crashes "

  m_initialiser = new QPushButton ( "Initialize", this); 
      m_initialiser -> move (600, 550); 
      QObject:: connect (m_initialiser, SIGNAL (clicked ()), m_progressbar, SLOT (reset ()));

[Zecho]

The program crashes on execution or compilation?
And what is the error report? (if it crashes to the compilation).

[Chrisch]

it was the problem in order to call the function :

class Example: public QWidget 
  ( 
     Q_OBJECT 
   
     QPushButton * bt_m; 
     QVector <QLineEdit *> le_m; 

     public: 
     Example () 
     ( 
        bt_m = new QPushButton ( "Click", this); 
        le_m. push_back (new QLineEdit (this)); 
           connect (le_m. back (), SIGNAL (triggered ()), this, SLOT (doSomething ())); 
        le_m. push_back (new QLineEdit (this)); 
           connect (le_m. back (), SIGNAL (triggered ()), this, SLOT (doSomething ())); 
     ) 

     private slots: 
     void doSomething () 
     ( 
         le_m [0] -> setText ( "hi"); 
         le_m [1] -> setText ( "hello"); 
     ) 
  );

[Zecho]

I was wrong if you connect m_progressbarre even before creation?
It's where I think the object sender and receiver must exist before the execution of connect (.....);