#include#include int main() { QSize size1(0, 0); QSize size2(10, 0); QSize size3(0, 20); QSize size4(30, 40); std::cout << std::boolalpha; std::cout << "size1.isEmpty() = " << size1.isEmpty() << std::endl; std::cout << "size2.isEmpty() = " << size2.isEmpty() << std::endl; std::cout << "size3.isEmpty() = " << size3.isEmpty() << std::endl; std::cout << "size4.isEmpty() = " << size4.isEmpty() << std::endl; return 0; }
size1.isEmpty() = true size2.isEmpty() = false size3.isEmpty() = false size4.isEmpty() = falseThis code creates four QSize objects with different dimensions and then calls the isEmpty function on each of them. The output indicates whether each QSize object is empty or not. The package/library for QSize is the Qt library.