QXmlStreamReader xml("mydata.xml"); while (!xml.atEnd() && !xml.hasError()) { // read next element xml.readNext(); // do something with the element // ... } if (xml.hasError()) { qDebug() << "XML error: " << xml.errorString(); }In this example, we create a QXmlStreamReader object and then use a while loop to read through the XML data. If an error occurs during parsing, we use the hasError function to detect it and print an error message. The Qt library is a cross-platform C++ application framework that provides a set of tools for developing desktop, mobile, and embedded applications.