<but i cant call the methods from my main. nothing happen. i mean no output as expected.>
what does it mean, what happens if you call the method, does it give you run time error or what. Why dont you add cout statements in your functions to see the flow of your program and see if ur debug messages are printed on the screen.
if not then probably your program is not even getting compiled after your changes.

If this is what I think it is, what's happening is that the listed dependencies are not complete.

When you change one of your header files, every cpp file that includes that header file, directly or indirectly, must be recompiled to be made aware of the changes you've made in the header. But the only dependencies your makefile sees are that, if something.cpp changes, it must rebuild something.o.

Try adding more dependencies in your makefile:

something.o:include1.h include2.h include3.h
someotherthing.o:include2.h
somethingelse.o:include3.h
# etc