Extract all included files in cpp

Question

I have .cpp file (text).I want to get the list of all files names which are included (#include) to this file. What is the best way to do it?(Need to implement it in C++)

Answer 1

gcc -M source.cpp

Replace -M with -MM if you don't care about the system includes.

Answer 2

Assuming you have a "find" or "grep", something along these lines:

g++ -E source.cpp | grep '\# 1 '