Qt - Cannot open include file - subdir [closed]

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I am new with Qt and Qt Creator. I have created some sub-directories in order to separate the classes of the project. Now, I am trying to include the headers in their respective sources but unsuccesfully.

I have separated the project as follow (-> means subdir):

Headers
   -> common
      -> tools
         abc.h

Sources
   -> common
      -> tools
         abc.cpp

in tools directories I have abc class. In my .pro file, it shows the following:

 HEADERS+= \
          Headers/common/tools/abc.h

 SOURCES += \
          Sources/common/tools/abc.cpp

Even though I cleaned and runned again qmake, there is a problem: when I want to include "abc.h" into "abc.cpp" in this way:

abc.cpp

 #include "Header/common/tools/abc.h"

Qt Creator shows this problem:

 C1083: Cannot open include file:  Headers/common/tools/abc.h: No such file or directory

I guess it is a problem of path which I can't find out. Can you? Thank you in advance

Answer 1

add

INCLUDEPATH += Header/common/tools

to .pro file and include your header simply like this

#include "abc.h"

Answer 2

You need to modify the INCLUDEPATH variable to add the folder where "Header" is located. Every path in a #include directive will be prepended by path in include path when searching for headers.

Answer 3

I didn't notice that the file was not in the right directory....so basic mistake! thank you all and sorry for bothering for that!

Answer 4

If I were you I would get a QT book. There are many of these little idiosyncrazies, and a book makes sense of it all when you read it in sequence.

I read this QT3 book, and it was the best tech-book I ever read, but it is out of date now. Here is one by the same author - I got that one too, and it is good too. Haven't read all of it.