error codes???

Using Arduino Programming Questions
1

get this code and well for some reason my brian can't figure out what is missing
'Adafruit_LSM303_Accel_Unified' has not been declared
from this line ;void Adafruit_LSM303_Accel_Unified::write8(byte address, byte reg, byte value)

2

No wonder! I don't see the #include for the library.

3

lar3ry:
No wonder! I don't see the #include for the library.

Or any reason for starting a statement with a semicolon.