How do I get current file path in c++? [duplicate]

Question

I want get current file path,like in a.cpp,I can get

/home/workspace/src/a.cpp

How can I get this　path?

Answer 1

You can use the standard macro __FILE__ to which expands to a string literal that contains the path of the current source file.

Starting from C++20, you can use default constructed std::source_location.