I have to know C for a non-programming job interview--not expert level, but enough to look at code and know what's going on. I've studied C++ but it's been a while and I'm rusty, so I need to study. The problem is, all the books I really like are for C++; there are very few for C alone.

Would I be okay studying C++ books and just avoiding the OOP-related parts (classes, objects, inheritance, polymorphism, encapsulation, <iostream> vs. <stdio.h>)? Or are there too many other major or minor differences that will screw me up on my C test? Any other significant differences to avoid?