class CALCSHARED_EXPORT Calc : public QObject
{
    Q_OBJECT
    public:
        Calc(QObject* pwgt) : QObject(pwgt){
            qDebug() << "[DLL]::CREATE";
            QScriptEngine *sh_engine = new QScriptEngine(this);
            qDebug() << "the magic number is:" << sh_engine->evaluate("1 + 2").toNumber();
        }
};

QScriptEngine *sh_engine = new QScriptEngine(this);
qDebug() << "the magic number is:" << sh_engine->evaluate("1 + 2").toNumber();


Calc *s_calc = new Calc(this);

#ifndef CALC_H
#define CALC_H

#include "calc_global.h"
#include <QObject>
//#include <QScriptEngine>
//#include <qDebug>

//class CALCSHARED_EXPORT Calc
//{

//    public:
//        Calc();
//};

class CALCSHARED_EXPORT Calc : public QObject {
    Q_OBJECT
    public:
        Calc(QObject *parent = 0);
};

#endif // CALC_H

#ifndef CALC_GLOBAL_H
#define CALC_GLOBAL_H

#include <QtCore/qglobal.h>

#if defined(CALC_LIBRARY)
#  define CALCSHARED_EXPORT Q_DECL_EXPORT
#else
#  define CALCSHARED_EXPORT Q_DECL_IMPORT
#endif

#endif // CALC_GLOBAL_H

#include "calc.h"
#include <QScriptEngine>
#include <qDebug>


Calc::Calc(QObject *parent) : QObject(parent){

    QScriptEngine *ml = new QScriptEngine(this);
    qDebug() << ml->evaluate("1+2+5").toNumber();

}

void MainWindow::on_pushButton_3_clicked()
{
    Calc *mc = new Calc(this);

}