error: opencv2/core/core_c.h: No such file or directory -- OpenCV 2.4.6 with Q5.1

[studentQt]

I was trying to write a camera program by watching an example video, when I finished writing codes , builted it then I got a messagge like at the title.

Actually , my problem isn't it.
Fisrt , I made a search in this forum and other sites , I find a solution , it's about the file paths but the problem is that I add the modules path but the problem doesn't solve

about the problem:

content of .pr
INCLUDEPATH += D:\opencv\include
INCLUDEPATH += D:\opencv\modules \
+calib3d\include
+contrib\include
+core\include
+features2d\include
+flann\include
+gpu\include
+highgui\include
+imgproc\include
+legacy\include
+ml\include
+nonfree\include
+objdetect\include
+photo\include
+stitching\include
+superres\include
+video\include
+videostab\include


LIBS += -LD:\opencv\build\x64\mingw\bin \
-Llibopencv_calib3d246.dll
-Llibopencv_contrib246.dll
-Llibopencv_core246.dll
-Llibopencv_features2d246.dll
-Llibopencv_flann246.dll
-Llibopencv_gpu246.dll
-Llibopencv_highgui246.dll
-Llibopencv_imgproc246.dll
-Llibopencv_legacy246.dll
-Llibopencv_ml246.dll
-Llibopencv_nonfree246.dll
-Llibopencv_objdetect246.dll
-Llibopencv_photo246.dll
-Llibopencv_stitching246.dll
-Llibopencv_superres246.dll
-Llibopencv_video246.dll
-Llibopencv_videostab246.dll

heard files on .h

#include <QDialog>
#include <opencv/highgui.h>
#include <opencv/cv.h>

when I clicked the error to find the error line, it shows me highgui.h heard file

1#ifndef __OPENCV_OLD_HIGHGUI_H__
2#define __OPENCV_OLD_HIGHGUI_H__
3
4#include "opencv2/core/core_c.h"
5#include "opencv2/core/core.hpp"
6#include "opencv2/highgui/highgui_c.h"
7#include "opencv2/highgui/highgui.hpp"
8
9#endif

the error line is 4

------------------
I changed the path in the error line (4th) like in "core/include/opencv2/core/core_c.h" way after that time there is another error:

error: opencv2/core/types_c.h: No such file or directory

Now , What are your suggestions?

Thanks for your help

-------------------------------
I added wrong tag in tags box sorry about that

[alainstgt]

just let your file finder do the job for you.
on my computer, windows explorer found 4 locations of the file types_c.h!

Alain

[studentQt]

do u think that's the exact solution? I think not

isn't there another suggestion ?

[ChrisW67]

Your INCLUDEPATH and LIBS continuation lines are all missing the ending backslash.

Your INCLUDEPATH variable makes no sense anyway. What are the "+" symbols supposed to mean?

Your LIBS variable: either list the full path to each library file OR (preferrably) use the -Lsearch_path and -lname form.
Declaring other libraries

Assuming your paths are generally correct then this should do it (these are for the binary install):

INCLUDEPATH += D:/OpenCV/build/include
 
# One of these variants depending on your compiler
# or an x64 version if you are building 64-bit
# 
LIBS += -LD:/opencv/build/x86/vc8/lib
LIBS += -LD:/opencv/build/x86/vc9/lib
LIBS += -LD:/opencv/build/x86/vc10/lib
LIBS += -LD:/opencv/build/x86/mingw/lib
 
# Add the libraries you actually use with -l options.  
LIBS += -lopencv_highgui246 \
    -lopencv_imgproc246 \
    -lopencv_objdetect246

INCLUDEPATH += D:/OpenCV/build/include

# One of these variants depending on your compiler
# or an x64 version if you are building 64-bit
# 
LIBS += -LD:/opencv/build/x86/vc8/lib
LIBS += -LD:/opencv/build/x86/vc9/lib
LIBS += -LD:/opencv/build/x86/vc10/lib
LIBS += -LD:/opencv/build/x86/mingw/lib

# Add the libraries you actually use with -l options.  
LIBS += -lopencv_highgui246 \
    -lopencv_imgproc246 \
    -lopencv_objdetect246

To copy to clipboard, switch view to plain text mode 

The exact paths depend on how you installed OpenCV.
At run time the relevant D:/OpenCV/build/x86/compiler/bin directory must be in the PATH for the executable to find the DLLs.

Then in your code:

#include "opencv/cv.h" 
#include "opencv/highgui.h"
 
int main(int argc, char** argv)
{
    IplImage* img = cvLoadImage( "image.jpg" ); 
    cvNamedWindow( "Example1", CV_WINDOW_AUTOSIZE );
    cvShowImage("Example1", img);
    cvWaitKey(0);
    cvReleaseImage( &img );
    cvDestroyWindow( "Example1" );
    return 0;
}

#include "opencv/cv.h" 
#include "opencv/highgui.h"
 
int main(int argc, char** argv)
{
    IplImage* img = cvLoadImage( "image.jpg" ); 
    cvNamedWindow( "Example1", CV_WINDOW_AUTOSIZE );
    cvShowImage("Example1", img);
    cvWaitKey(0);
    cvReleaseImage( &img );
    cvDestroyWindow( "Example1" );
    return 0;
}

To copy to clipboard, switch view to plain text mode 

---

Added after 4 minutes:

do u think that's the exact solution? I think not
isn't there another suggestion ?

No, the exact solution requires you to gain a little understanding how a compiler and linker work together to find required components and build an executable, and how that executable finds the things it needs to run. That has little to do with Qt, however, that understanding quickly resolves exactly the sort of problems you are experiencing here.

[studentQt]

I tried to write a path for an image but qt gives errors

the error.jpg

do u have a suggestion about this?

[ChrisW67]

The compiler warning on line 8 is because you have an unescaped backslash in the C++ string literal and there is no escape code "\i".

The linker errors are because your LIBS variable is still wrong.

[studentQt]

my .pro file content

#-------------------------------------------------
#
# Project created by QtCreator 2013-09-11T03:55:37
#
#-------------------------------------------------
 
QT       += core
 
QT       -= gui
 
TARGET = camera_onConsole
CONFIG   += console
CONFIG   -= app_bundle
 
TEMPLATE = app
 
INCLUDEPATH += D:\opencv\build\include
 
LIBS += -LD:\opencv\build\x64\mingw\lib
LIBS += -LD:\opencv\build\v9\mingw\lib
LIBS += -LD:\opencv\build\v10\lib
LIBS += -LD:\opencv\build\v11\mingw\lib
 
LIBS += -lopencv_highgui246 \
    -lopencv_imgproc246 \
    -lopencv_objdetect246
 
SOURCES += main.cpp

#-------------------------------------------------
#
# Project created by QtCreator 2013-09-11T03:55:37
#
#-------------------------------------------------

QT       += core

QT       -= gui

TARGET = camera_onConsole
CONFIG   += console
CONFIG   -= app_bundle

TEMPLATE = app

INCLUDEPATH += D:\opencv\build\include

LIBS += -LD:\opencv\build\x64\mingw\lib
LIBS += -LD:\opencv\build\v9\mingw\lib
LIBS += -LD:\opencv\build\v10\lib
LIBS += -LD:\opencv\build\v11\mingw\lib

LIBS += -lopencv_highgui246 \
    -lopencv_imgproc246 \
    -lopencv_objdetect246

SOURCES += main.cpp

To copy to clipboard, switch view to plain text mode 

waiting to your suggestions

[ChrisW67]

# One of these variants depending on your compiler
# or an x64 version if you are building 64-bit
# 
LIBS += -LD:/opencv/build/x86/vc8/lib
LIBS += -LD:/opencv/build/x86/vc9/lib
LIBS += -LD:/opencv/build/x86/vc10/lib
LIBS += -LD:/opencv/build/x86/mingw/lib

# One of these variants depending on your compiler
# or an x64 version if you are building 64-bit
# 
LIBS += -LD:/opencv/build/x86/vc8/lib
LIBS += -LD:/opencv/build/x86/vc9/lib
LIBS += -LD:/opencv/build/x86/vc10/lib
LIBS += -LD:/opencv/build/x86/mingw/lib

To copy to clipboard, switch view to plain text mode 

One of these variants, not all of those variants, not random variations on them etc. Above all they should actually match the compiler you are using (vc9, vc10, vc11, or mingw), the architecture you are building for (x86 or x64), and the actual location of the files on you hard drive. In your case I would guess mingw and x86.

You will also note I am using UNIX-style path separators '/' not Windows-style '\'. This avoids the need to constantly escape the backslashes to suppress the warnings that qmake issues (I am sure you have noticed).

[studentQt]

thanks for all of your helps , I have just one error

the last error.jpg

pro_file.jpg

now , what should I do?