So, for instance I have a bunch of files:

root-dir:
  dir-a:
    read.cpp
  dir-b:
    code.cpp
  lib.cpp
  lib.h

lib’s files:

//lib.cpp

#include <string>
using namespace std;

string edit(string in) {
    string out;
    /*function body*/
    return out;
}

//lib.h

#include <string>
std::string edit(std::string in);

I need to include lib’s function in both “read.cpp” and “code.cpp”.

I tried to:

• #include "lib.cpp" from both files, but it failed: fatal error: lib.cpp: No such file or directory

• #include "lib.h" . Same: fatal error: lib.h: No such file or directory

• #include "root-dir/lib.h", it highlights red: 'root-dir/lib.h' file not found

Obviously, #include "C:/.../.../root-dir/lib.h" is not a proper solution.