import when prompted to find or path does not exist

I built a directory source in b, there is a lower b am
There is a c.m next source:

# Import "b / a.m"

Tips path does not exist here
Reply:
No answer it? I Dingding
I am a newcomer, seeking guidance
Reply:

The reply was deleted at the moderator 2010-11-19 09:48:19

Reply:
Please # import. H file
Reply:
# Import "a.h"
# Import "b.h"
# Import "c.h"
Reply:
Sorry, did not say clearly, I import is. H file
# Import "Cl / Father.h" Tip: Cl / Father.h: No such file or directory
I looked at the program directory, that he did not establish Cl catalog, really strange, I obviously built in Xcode inside the ......

reference to the third floor cloudhsu reply:

please # import h file

.
Reply:
I know, I'm new the Group, instead of Folder, but looks like there is no new Folder Xcode's ......