QSizeF size(5.5, 10.2);
QSizeF size(5.5, 10.2); qDebug() << "Width: " << size.width(); // Output: Width: 5.5 qDebug() << "Height: " << size.height(); // Output: Height: 10.2
QSizeF size(5.5, 10.2); float scaleFactor = 1.5; size *= scaleFactor; // Scale the QSizeF object qDebug() << "Scaled size: " << size.width() << " x " << size.height(); // Output: Scaled size: 8.25 x 15.3The package library for QSizeF is Qt library, which is a cross-platform C++ application development framework.