No our course matewrials just cover how to write the code...not to fix the errors.....

In my humble experience, writing the code IS fixing the errors... The two are inextricable, as ELISHEVA said.

I do think you need to have a visit with your professor. Options such as getting a tutor may also be available for you.

Good luck.

Update: This Tutorial should also help: Basic debugging checklist. (Also added attribution, above.)