1  #include "mainwindow.h"
2  #include "myclass.h"
3  #include <QApplication>
4  #include "QLabel"
5  #include "QObject"
6  int main(int argc, char *argv[])
7  {
8      QApplication a(argc, argv);
9      MyClass *c = new MyClass();
10     QLabel *result = new QLabel();
11     result->resize(500, 100);
12     result->setIndent(10);
13     result->setFont( QFont( "times", 12, QFont::Bold) );
14     c->setRadius(10);
15     QObject::connect(c, SIGNAL(changedValues(QString)),
16                      result, SLOT(setText(QString)));
17     c->calculate();
18     result->show();
19     return a.exec();
20 }
