Should I Learn C++ or C++?

C is the best way to learn about how basically the machine works at a certain level of abstraction. C++, it's just a toolkit for creating additional abstractions that are better than the abstractions you can create with C. The only real kind of abstraction you can create in C is a subroutine or a function call. And thus, you can make your code that much smaller because you can build and use these abstractions.