What is the difference between #include "MyClass.h" and #include ". \ Myclass.h"

Question

I am developing VS2010 and want to add code to an existing project. By the way, this is Win32 / MFC.

And I couldn't help but notice that in the MyClass class (in this case, MyClass was an extension of the CDialog class) at the top of the cpp file the following was included:

#include "MyClass.h"
#include ".\myclass.h"

I noticed that the second inclusion was entered without a capital letter, but I could not understand why?

Answer 1

" MyClass.h" will be searched by the path INCLUDE_DIR, which is defined in the settings of your project.

" ./myclass.h" will search in the same directory as the current file.

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Answer 2

.\ , . , .

Answer 3

#include "MyClass.h" - , #include ".\myclass.h" - .

, "MyClass.h" inc , MyClass.cpp .