c++ - Qt include header file from above directory -

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at first, don't think become problem, after few day working it, still can't find solution

source   |   |--- model   |      |   |      | - a.h   |-b.h

i can't include b.h a.h, compiler complain

"cannot open include 'b.' : no such file or directory

and .pro file

template = app qt += qml quick widgets sql qt += declarative resources += qml.qrc include(deployment.pri) headers += \    sources/b.h \    sources/model/a.h

a.h

#ifndef a_h #define a_h #include "source/b.h" class { }; #endif

b.h

#ifndef b_h #define b_h class b {  }; #endif

how can fix this? , thank dropping by

the path include file relative source file including it. here in a.h should have :

#include "../b.h"

or add path include directories adding .pro :

includepath += $$pwd/source

and include header file like:

#include "b.h"

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