QFile file("example.txt"); file.open(QIODevice::WriteOnly | QIODevice::Text); QTextStream out(&file); out << "Hello, world!"; file.close();
QString str = "Hello, world!"; QTextStream in(&str); QString line = in.readLine(); qDebug() << line;This code creates a QString containing the text "Hello, world!" and reads it using QTextStream. It then prints the first line using qDebug(). The package library for QTextStream is Qt, a cross-platform application framework that provides a set of tools and technologies for developing desktop and mobile applications. It is developed by The Qt Company and is available under both commercial and open source licenses.