@SureshVenkat, thanks for your suggestion, I'll try this then try to ask it in CSThoery, my problem is I'm not near to my Prof (because of some required certificate, I'm still in Iran) and I start to work with him in offline mode, Also my questions are not hard to answer if I just talk with someone and express it and he/she just say a note, but also they aren't easy (needs good knowledge in field) and this situation (offline working) will be ended soon :)
