#include <QtConcurrent/QtConcurrentRun>
#include <QFuture>
#include <QTime>
#include <QDebug>

void test();

int main()
{
    QTime timer;
    timer.start();
    QFuture<int> future = QtConcurrent::run(timer, &QTime::elapsed);
    qDebug() << "First run: " << future.result();
    timer.restart();
    QFuture<int> future2 = QtConcurrent::run(timer, &QTime::elapsed);
    qDebug() << "Second run: " << future2.result();
}