include QtCore include QtWidgets class Proger QDataStream operator QDa

#include <QtCore>
#include <QtWidgets>

class Proger;
QDataStream& operator>>(QDataStream &in, Proger *p);

class Proger {
    public:
        int age;
        bool canReinstallWindows;

        Proger(int age, bool cRW) {
            this->age = age;
            this->canReinstallWindows = cRW;
        }

        static void save(Proger *p, QString filename) {
            QFile f(filename);
            f.open(QIODevice::WriteOnly);
            QDataStream out(&f);
            out.setVersion(QDataStream::Qt_5_2);
            out << p;
            f.close();
        }

        static void load(Proger *p, QString filename) {
            QFile f(filename);
            f.open(QIODevice::ReadOnly);
            QDataStream in(&f);
            in.setVersion(QDataStream::Qt_5_2);
            in >> p;
            f.close();
        }
};

QDataStream& operator>>(QDataStream &in, Proger *p) {
    in >> p->age >> p->canReinstallWindows;
    return in;
}

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    Proger proger(24, true);
    Proger::save(&proger, "/etc/dir/file.txt");
    return a.exec();
}