qt hello world demo The demo program is annotated

HelloWorld\HelloWorld.pro
HelloWorld\HelloWorld.pro.user
HelloWorld\main.cpp
HelloWorld
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\Makefile.Release
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\debug\main.o
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\.qmake.stash
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\Makefile
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\Makefile.Debug
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\debug\HelloWorld.exe
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\debug
build-HelloWorld-Desktop_Qt_5_9_1_MinGW_32bit-Debug\release

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