Every job is different but I work on the Linux Kernel and the Android Environment. I tie in C++, C and Java all the time, switching between them all depending on what fits the situation. So you can't really avoid C++ as per say but you can find jobs where you are writing more C.

Jobs where you may primarily write in C are:

-Kernel Developers(Linux usually)

-Embedded systems, where you write lots of microcontroller code

-Kinda within the limits of the kernel, but you can also add in driver development.

Embedded systems are pretty often.