Go to your professor's (for any class, not just CS) office hours whenever those hours aren't in demand (e.g. they are often in demand right before a midterm, so go other times).
A college degree is expensive and one of those things you pay for is to have several subject-matter experts who are required to talk to students about their field of expertise for an hour if any students show up. People complain that being an SME doesn't necessarily make you a good teacher (which is 100% true) but one-on-one (which happened at least once per semester for me for any class with less than about 150 students), they usually love talking about their field of expertise.
A college degree is expensive and one of those things you pay for is to have several subject-matter experts who are required to talk to students about their field of expertise for an hour if any students show up. People complain that being an SME doesn't necessarily make you a good teacher (which is 100% true) but one-on-one (which happened at least once per semester for me for any class with less than about 150 students), they usually love talking about their field of expertise.