int led=3;
int temppin=A0;
float temp;
void setup() {
 pinMode(led,OUTPUT);
 pinMode(temppin,INPUT);
 Serial.begin(9600);

}
void loop() {
temp=analogRead(temppin);
temp=temp * 0.48828125;
Serial.print("Temprature=");
Serial.print(temp);
Serial.print("C");
Serial.println();
delay(1000);
if (temp>80){digitalWrite(led, HIGH);}
else{digitalWrite(led, LOW);}
}