c++ - lotto gui application that generates random numbers -

#ifndef lotto_h #define lotto_h #include <qwidget> #include <qlabel> #include <qtextedit> #include <qpushbutton> #include <qgridlayout>  class lotto : public qwidget {     q_object  private:     //widget data members     qlabel* numberslabel;     qtextedit* numedit;     qpushbutton* lotusbutton;  public slots:      int generatelotterynumbers ();      void displaynumbers();  public:     lotto(); };  #endif // lotto_h          #include "lotto.h"         #include <stdlib.h>         #include <time.h>         #include <qwidget>         #include <qgridlayout>         #include <iostream>         #include <sstream>         #include <qstring>         #include "lotto.h"         using namespace std;          lotto::lotto(){             setwindowtitle("lotto numbers");             qgridlayout* layout = new qgridlayout(this);             lotusbutton = new qpushbutton ("lotto numbers");             numberslabel = new qlabel ("your lucky numbers are:");             numedit = new qtextedit();             layout->addwidget(lotusbutton, 0,0);             layout->addwidget(numberslabel, 1,0);             layout->addwidget(numedit, 1,1);             setlayout(layout);           //connect signals , slots             connect(lotusbutton,signal(clicked()),this, slot(generatelotterynumbers()));         }         int lotto::generatelotterynumbers (){             srand ( time(null) );                int i, j, num, duplicates, numbers[6];                 ( = 0; < 6; i++ ) {                    {                        num = 1 + rand()%49;                        duplicates = 0;                        ( j = 0; j < i; j++ ) {                            if ( numbers[ j ] == num ) duplicates = 1;                        }                    }                    while (duplicates);                    numbers[ ] = num;             }          }          void lotto::displaynumbers(){             numedit->settext(qstring::number(generatelotterynumbers()));         } 

i try display 6 lotto numbers in textedit box. better use lineedit? textbox remains empty when click lotto number button. why? how can textbox (or linebox) display numbers?

i tried this:

void lotto::displaynumbers(){     srand ( time(null) );        int i, j, num, duplicates, numbers[6];         ( = 0; < 6; i++ ) {            {                num = 1 + rand()%49;                duplicates = 0;                ( j = 0; j < i; j++ ) {                    if ( numbers[ j ] == num ) duplicates = 1;                }            }            while (duplicates);            numbers[ ] = num;     }     numedit->settext(qstring::number(num)); } 

and each time click button different number (one @ time)

as can see code lotto::displaynumbers method not being called after button click. button click signal connected lotto::generatelotterynumbers method instead.

also can not see return statements in lotto::generatelotterynumbers method.

by way figure out if spend minute in debugger.