1  #ifndef MYCLASS_H
2  #define MYCLASS_H
3  #include <QMainWindow>
4  #include <QObject>
5  #include <QWidget>
6  class MyClass : public QObject
7  {
8     Q_OBJECT
9  public:
10     explicit MyClass(QObject *parent = nullptr);
11     void setRadius(int);
12  private:
13      int radius;
14      double area, perime;
15  signals:
16      void changedValues(QString);
17   public slots:
18      void calculate();
19 };

#endif // MYCLASS_H
