C++ "standalone" # operator

Question

I 've compiled the file "hello.cpp" using the command "g++ -save-temps hello.cpp" and in the preprocessed file ("hello.ii") I saw lots of hashtags with no directives.

Ex. :

# 1 "/data/data/com.n0n3m4.droidc/files/gcc/arm-linux-androideabi/include/c++/7.2.0/stdio.h" 1 3

Can anybody tell me what do they mean?

Note: I 'm using GCC on C4droid.

Answer 1

They are intermediate files obtained from preprocessing headers... more info here https://gcc.gnu.org/onlinedocs/cpp/Preprocessor-Output.html

Answer 2

thanks