#include <QCoreApplication>
#include <iostream>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    int32_t var = 1'000;
            std::cout << "var: " << var << std::endl;

    var = 1'000'000;
    std::cout << "var: " << var << std::endl;

    var = 1'000'000'000;
            std::cout << "var: " << var << std::endl;

    return a.exec();
}