A few years ago now at my work I wanted to get my head around how our large c++ code base worked I used a tool called Doxygen it was pretty useful for reading a

A few years ago now at my work I wanted to get my head around how our large c++ code base worked I used a tool called Doxygen it was pretty useful for reading and visualizing the source code. It output html pages and could generate dependency graphs etc automatically would show you which file a function came from let you browse by class or by individual source files etc. You could easily see every file a class was referenced in etc. Downside was it took a long time (many hours) to scan the entire codebase.