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QT_REQUIRE_VERSION (int argc , char ** argv , const char * version )

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QT_REQUIRE_VERSION ( int argc , char ** argv , const char * version )

This macro can be used to ensure that the application is run with a recent enough version of Qt. This is especially useful if your application depends on a specific bug fix introduced in a bug-fix release (for example, 6.1.2).

The argc and argv parameters are the main() function's argc and argv parameters. The version parameter is a string literal that specifies which version of Qt the application requires (for example, "6.1.2").

范例：

#include <QApplication>
#include <QMessageBox>
int main(int argc, char *argv[])
{
    QT_REQUIRE_VERSION(argc, argv, "4.0.2")
    QApplication app(argc, argv);
    ...
    return app.exec();
}