main already checks score against MIN_SCORE and MAX_SCORE – your only job is to #define both, to 0
and 100 respectively, so the file compiles at all.
Notice there’s no semicolon and no = in a #define – it isn’t a C statement, it’s a preprocessor directive, and
the compiler never sees MIN_SCORE or MAX_SCORE as names at all; by the time compilation starts, every
occurrence has already been replaced with the literal number.