Most in Demand Language?

So, what languages are in the most demand in the industy? What do you think? C/C++? Java? And so on?

Speaking of C/C++ which is better to learn first? C or C++? Is it wise to just forget C and go with C++? Or learn C and then go on to C++? Or is it okay to just stick with C?

This is with previous programming knowledge. I've dabled in other things already (like Java and Python).