code: H:\Programming\C++\QtSample>make Debug mingw32-make -f Makefile.Debug mingw32-make[1]: Entering directory `H:/Programming/C++/QtSample' g++ -c -g -g -frtti -fexceptions -Wall -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -I"H:/Qt/4.2.1/ include/QtCore" -I"H:/Qt/4.2.1/include/QtCore" -I"H:/Qt/4.2.1/include/QtGui" -I" H:/Qt/4.2.1/include/QtGui" -I"H:/Qt/4.2.1/include" -I"." -I"H:/Qt/4.2.1/include/ ActiveQt" -I"debug" -I"." -I"..\..\..\Qt\4.2.1\mkspecs\default" -o debug\main.o main.cpp main.cpp:1:26: gapplication.h: No such file or directory main.cpp:2:20: glabel.h: No such file or directory main.cpp: In function `int main(int, char**)': main.cpp:6: error: `QApplication' undeclared (first use this function) main.cpp:6: error: (Each undeclared identifier is reported only once for each fu nction it appears in.) main.cpp:6: error: expected `;' before "app" main.cpp:7: error: `QLabel' undeclared (first use this function) main.cpp:7: error: `label' undeclared (first use this function) main.cpp:7: error: `QLabel' has not been declared main.cpp:8: error: `app' undeclared (first use this function) mingw32-make[1]: *** [debug\main.o] Error 1 mingw32-make[1]: Leaving directory `H:/Programming/C++/QtSample' mingw32-make: *** [Debug] Error 2 H:\Programming\C++\QtSample>set INCLUDE=H:\Qt\4.2.1\include\;H:\Qt\4.2.1\include\Qt\ LIB=H:\Qt\4.2.1\lib\ Path=H:\Qt\4.2.1\bin\;H:\MinGW\bin\; QDIR=H:\Qt\4.2.1\ QMAKESPEC=g++ QTDIR=H:\Qt\4.2.1
code:#include <gapplication.h>#include <glabel.h>int main(int argc, char *argv[]){ QApplication app(argc, argv); QLabel *label = new QLabel("Hallo Qt!", 0); app.setMainWidget(label); label->show(); return app.exec();}