The mechanism for sharing definitions, 'include' aka "copy file here", is absolutely not elegant. The absolute minimum you could do maybe, but not elegant.
Not to mention the whacky preprocessor as a whole...
I would say includes/standard library/compilers going crazy on UB is part of the infrastructure or ecosystem around the language and not the language itself. And I agree absolutely, while C the language is beautiful, the infra around it is atrocious.
