C++ or C?

What is the difference between those two programming languages? I've looked at both of them, and it seems they are basically the same, except C looked a little more complicated. I know that C++ has object oriented programming, but I'm not sure if that is a component of C. Is there anything that you can do with C++ that you can't do with C, and vice versa? I'm just thinking about learning one of them and I want to know which one I should try.