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mkdir qthello
cd qthello
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#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 ();
}
2.±àÒë
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qmake -project   #×Ô¶¯Éú³É¹¤³ÌÎļþ qthello.pro
qmake                  #×Ô¶¯Éú³ÉMakefileÎļþ
make                    #±àÒ룬Éú³ÉÄ¿±êÎļþhello.oºÍ×îÖյĿÉÖ´ÐгÌÐòqthello
3.ÔËÐÐ
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./qthello


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