I am trying to design a menu structure for my lcd / keypad

what is the best method of design c code

I am using four char variable counters for the different levels of menu option.

i.e main setup options would be char 1
sub options would be counter 2
and sub sub option would be counter 3

is this the best way to design a complex menu in c

I have a similar requirment to a mobile phone setup method i.e. lots of different option to setup, with lots of sub option settings etc.

the way I have chosen seems to be getting a bit messy, is there a better way to do this or any good books on this type of 'C' programming

many thanks

John