Alarm.pde👎 error: variable or field 'printAddress' declared void

Using Arduino Programming Questions
10

mspohr:
I put the OneWire .h files in: Documents/Arduino/libraries/OneWire

I have these lines in the "Alarm" sketch:

#include <OneWire/OneWire.h>
#include <OneWire/DallasTemperature.h>

You need not just the .h files but the associated .cpp files as well in the same folder as the .h files

Further, I believe that you have tried to combine two libraries into a single directory. You should have a

Documents/Arduino/libraries/OneWire

which would contain
Documents/Arduino/libraries/OneWire/OneWire.h
Documents/Arduino/libraries/OneWire/OneWire.cpp

and

Documents/Arduino/libraries/DallasTemperature

should contain
Documents/Arduino/libraries/DallasTemperature/DallasTemperature.h
Documents/Arduino/libraries/DallasTemperature/DallasTemperature.cpp

and then your includes should look like:

#include <OneWire.h>
#include <DallasTemperature.h>