linux based C++ project-how to start

[Ragia Ibrahim]

Dear group, 
I have a C++ project taht contain many fiels .cc and .h, no 
file named main or so...how cah I trace the project and start it step by
 step to understand its concept, should I draw a map for files calling 
each other, how to find first one to be executed, and what is the meaing
 of program file ?

 thanks in advance

Ragia