I would say HTML is easier than C++. I taught myself HTML when I was around 11 years of age. I am learning C++ now, and personally think I would have struggled a lot if I had attempted to teach myself. Regardless of how old I am.
If you are interested in learning C++, I would suggest learning Java first.
okay so you obviously know HTML is for the internet...it is also wayyy easier but also gets into otehr things like CSS and the current version of HTML is HTML 4...not very different from other version just FYI....but HTML is easier and good for like making websites and myspace code and stuff but isnt' really fun...the fun internet code is java where u can make games and stuff.....
now C++ is the harder one by far and isn't used on the internet...but it is used to make windows applications as well as games that run on the computer so it would be a lot funner to mess around with applications with this as well as games and for future reference if you learn C++ you will be way better off then HTML but you better be ready because C++ is a lot harder, but i would go with C++ anyday over HTML...now java vs C++ thats another story haha...hope this helps ur decision