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#include <QtCore/QCoreApplication>
#include "myclass.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    MyClass *cla = new MyClass();
    QObject::connect(cla, SIGNAL(cl()), qApp, SLOT(quit()));
    cla->ex();
    return a.exec();
}

#ifndef MYCLASS_H
#define MYCLASS_H
#include <QObject>


class MyClass : public QObject
{
    Q_OBJECT
public:
    MyClass(QObject *parent = 0);

    void ex();
signals:
    void cl();

};

#endif // MYCLASS_H

#include "myclass.h"

MyClass::MyClass(QObject *parent) : QObject (parent)
{

}

void MyClass::ex()
{
    emit cl();
}