Recommend C front-end that preserves preprocessor directives?

Take a look at Clang . (See http://clang.llvm.org/features.html#applications .).

Take the GNU gcc compiler, the flags required to pre-process the source is gcc -E mysource. C, see here for further information. As for pretty printing it, there's indent and this explains the usage here, this is a bit old, but nonetheless worthy of mention.

There is also cflow that can produce a map of the source.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.