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

OneWire oneWire(A0); //pin A0
DallasTemperature sensor(&oneWire);

void setup(void) {    Serial.begin(9600);   
pinMode(A0, INPUT); 
  sensor.begin();                            
}

void loop(void) {
  sensor.requestTemperatures();
  Serial.println(sensor.getTempCByIndex(0));
  delay(100);
}