README.md

Qt Hello World example

sudo apt-get install -y qt5-default
qmake -project
echo "QT += widgets" >> qt_example.pro
qmake
make

hello_qt.cpp

#include <QtWidgets>
int main( int argc, char *argv[] )
{ 
	QApplication myapp( argc, argv );
	QLabel *mylabel = new QLabel("Hello world");
	mylabel->show();
	return myapp.exec();
}

qt_example.pro

#########################################################
# Automatically generated by qmake (3.1) Wed Jun 6 04:52:28 2018
######################################################################

TEMPLATE = app
TARGET = qt_example
INCLUDEPATH += .

# The following define makes your compiler warn you if you use any
# feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

# Input
SOURCES += hello_qt.cpp

QT += widgets