these errors have also shown.
DHT22_Tester22:40: error: expected primary-expression before '.' token
DHT22_Tester22:40: error: expected unqualified-id before '(' token
DHT22_Tester22:40: error: invalid operands of types 'float' and 'int' to binary 'operator^'
DHT22_Tester22:42: error: expected ';' before 'if'
DHT22_Tester22:63: error: expected '}' at end of input
too few arguments to function 'double pow(double, double)'