Tut's on basic c for arduino?

i read the tut's page, and its really good, but it's also confusing, and some tutorials dont give a finished code, they give a code that your sapposed to finish, and i dont know how to becuase i suck at c, i dont know what they want me to add, even if they say what to add!

lets take for example the piezo tone maker, what the hell is that about?! i put it on my ardiuno program and tried to uplaod, but it had a bagillion syntax errors, am i missing something, why isint it just going to the arduino and working?