c/c++ programmers

the course im taking isnt on python though. reason i ask is that im determining if i really need to purchase the book required for the class or not. the thing with programming languages is that its very available on the internet. with js at least, w3school provides basically everything from the ground up (various math methods, string, arrays, etc). with java there are forums which people do post codes for public use. basically if i can utilize the internet to learn c++ along with help from my instructor, i wanna save a few hundred dollars from not having to buy the book(s).