檔名：hello.cpp

#include <QApplication>
#include <QLabel>

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QLabel *label = new QLabel("hello QT!");
label->show();

return app.exec();
}

編譯執行： [email protected]:~/xb/hello$ ls hello.cpp [email protected]:~/xb/hello$ qmake -project [email protected]:~/xb/hello$ ls hello.cpp  hello.pro [email protected]:~/xb/hello$ qmake hello.pro  [email protected]:~/xb/hello$ ls hello.cpp  hello.pro  Makefile [email protected]:~/xb/hello$ make g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -o hello.o hello.cpp g++ -m64 -Wl,-O1 -o hello hello.o    -L/usr/lib/x86_64-linux-gnu -lQtGui -lQtCore -lpthread 

[email protected]:~/xb/hello$ ls hello  hello.cpp  hello.o  hello.pro  Makefile [email protected]:~/xb/hello$ ./hello  [email protected]:~/xb/hello$