Some libraries do go with a pair because they find the single header too spartan or awkward. Either way works, the C preprocessor and compiler should chew throu

Some libraries do go with a pair because they find the single header too spartan or awkward. Either way works, the C preprocessor and compiler should chew through either style effortlessly and it's trivial to spit the header into a pair or merge a pair into a header by hand if you wish.