large program data structure

[Robert S]

Hello group
Since I want to modify a large program written in C(40K line) for the
academic purposes and the program consists of several modules, it is
necessary to have software structure in order to modify the
program.Unfortunately the program has no documentation regarding software
structure except comments inside code.
Anybody knows what is the best tool for extracting structure of the large
programs such as one I indicated above.?
Thanks
bob

 

[Joe Wright]

Hello group
Since I want to modify a large program written in C(40K line) for the
academic purposes and the program consists of several modules, it is
necessary to have software structure in order to modify the
program.Unfortunately the program has no documentation regarding software
structure except comments inside code.
Anybody knows what is the best tool for extracting structure of the large
programs such as one I indicated above.?
Thanks
bob

The reference to 'comments inside code' suggests you have source code.
If so, modify the source as you need and compile it. If not, find the
author of the program and coerce the source code out of her.