C++各種接尾辞ファイル名を理解する.c, .cc, .cpp, .h, .o, .lib ...

.cc|.cpp|.c++|.cp|.cxx|.C|.CPP

GNU GCC recognises all of they as C++ files, and will use C++ compilation regardless of whether you invoke it through gcc or g++.

.c vs. .C

.C is a C++ file, but .c is a C file.

.cpp VS .cc

cc = C with classes
cpp = C puls plus

References

C++ code file extension? .cc vs .cpp [closed]