error: variable or field declared void

Hi! I'm in the process of combining two codes to make the color of a LED pin change with temperature. Since I'm new to Arduino, when I looked up the error I received, I didn't really understand what was going on, especially because a solid conclusion wasn't really reached.

I've attached my code and here are my error messages:
combo:6: error: variable or field 'printTemperature' declared void
combo:6: error: 'DeviceAddress' was not declared in this scope
variable or field 'printTemperature' declared void

any help would be so appreciated! Thank you!

combo.ino (2.63 KB)

The IDE tries to generate function prototypes for you. It is not always successful. Add your own (for printTemperature()) before setup() and loop(). Move the code that comes before the #include statements to the end of the file.