Errors with include qtwidget

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Hi, i create a gui project and delete main.cpp.
i add libpcap and ndpi libs to project.
i run simple ndpi example in it's package and it works good (print every thing with printf).
when include <qtwidget> it has 346 error.
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why?
this is part of errors:
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In file included from /opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qobjectdefs.h:45:0,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtGui/qwindowdefs.h:46,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtWidgets/qwidget.h:45,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtWidgets/QWidget:1,
from ../untitled6/pcapReader.c:44:
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qnamespace.h:53:1: error: unknown type name 'namespace'
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qnamespace.h:57:4: error: expected '=', ',', ';', 'asm' or 'attribute' before '{' token
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qnamespace.h:1542:33: error: expected ')' before ':' token
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qnamespace.h:1565:1: warning: data definition has no type or storage class [enabled by default]
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qnamespace.h:1565:1: warning: type defaults to 'int' in declaration of 'class' [-Wimplicit-int]
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qnamespace.h:1565:21: error: expected ',' or ';' before 'QInternal'
In file included from /opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qobjectdefs.h:47:0,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtGui/qwindowdefs.h:46,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtWidgets/qwidget.h:45,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtWidgets/QWidget:1,
from ../untitled6/pcapReader.c:44:
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qobjectdefs_impl.h:53:1: error: unknown type name 'namespace'
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qobjectdefs_impl.h:53:21: error: expected '=', ',', ';', 'asm' or 'attribute' before '{' token
In file included from /opt/Qt5.0.1/5.0.1/gcc/include/QtGui/qwindowdefs.h:46:0,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtWidgets/qwidget.h:45,
from /opt/Qt5.0.1/5.0.1/gcc/include/QtWidgets/QWidget:1,
from ../untitled6/pcapReader.c:44:
/opt/Qt5.0.1/5.0.1/gcc/include/QtCore/qobjectdefs.h:54:1: error: unknown type name 'class'

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SGaist

Hi,

Could you rewrite your post ? Right now there's not much thing we can really read on it

SGaist

Could you share your pro file and code ? Without it it will be difficult to see where the problem might come from

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i will do that in minutes.

raven-worx

what are the extensions of your source files? Are they anything else then 'cpp'?
Are you trying to compile your C++ application with with C settings? What Qt package do you use?

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this is pcabreader.c
http://hostcode.sourceforge.net/view/964

i use qt 5.0.1 on ubuntu

SGaist

Then there's you problem, you are trying to compile Qt code using a c compiler rather than c++.

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so how can i create interface for that?

raven-worx

easiest would probably be to rename "pcabreader.c" to "pcabreader.cpp" if thats possible.
Otherwise keep your C++/Qt stuff away from your C-only stuff.

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thanks i will test them.