Hello World – Qt program
Now, let's get started with GUI application development using Qt/C++. Before getting into the following sections, download Qt SDK and Qt Creator from Qt's official site (https://www.qt.io/download). The codes that we are going to discuss in this chapter are entirely LGPL compatible and will be hand-coded by writing pure C++ code. The Qt framework is designed to be pleasant and intuitive so that you can handcode an entire application without using the Qt Creator IDE.
Note
Qt Creator is a cross-platform C++, JavaScript, and QML integrated development environment, a part of the SDK for the Qt GUI application development framework. It includes a visual debugger and an integrated GUI layout and forms designer. The editor's features include syntax highlighting and autocompletion. Qt Creator uses the C++ compiler from the GNU Compiler Collection on Linux and FreeBSD. On Windows, it can use MinGW or MSVC, with the default install, and can also use Microsoft Console Debugger...