Question

Sorry for this newbie question, but I can’t find on google what I need to know.

I understand return, but don’t understand this… What does it mean this?

  return (tail+1)%N == head%N;

Thanks a lot for patience.

Answer 1

It returns true or false, depending on whether the expression is true or not.

It’s the same as:

if ( (tail+1)%N == head%N )
   return true;
else
   return false;