QT Classic error message qapplication:no such file or directory

QT Classic error message qapplication:no such file or directory

This error message is generally the first example of QT programming when a novice compiles Qt5 first application "Hello,world". are

It's easy to say.

#include <QApplication>

#include <QWidget>

int main (int argc, char *argv[])

{

Qapplication app (ARGC,ARGV);

Qwidget *ww=new qwidget ();

Ww->resize (300,200);

Ww->show ();

return App.exec ();

}

A compilation result appeared above this error, that call a depressed.

In fact, spend a bit of mind to follow the hint, novice also can solve their own problems. The method is also very simple, that is, after performing the following two steps

Qmake-project

Qmake

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Immediately modify Hello.pro This project file, add a line of code as follows:

QT + = GUI declarative

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Once saved, take the last step:mingw32-make.exe

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This allows you to compile a release version of the Hello.exe in the release directory , note, not the Debug directory Oh.

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This article is from the "Galaxy Lin" blog, please be sure to keep this source http://kpjack.blog.51cto.com/627289/1612680

QT Classic error message qapplication:no such file or directory