Arduino juttu 1.3

const int nappi = 2;
const int kaiutin = 8;
int lampo = 0;
int temp = 0;
int analogPin = 3;
int volume = 0;
int napintila = 0;
void setup() {
pinMode(nappi, INPUT);
pinMode(kaiutin, OUTPUT);
Serial.begin(9600);
}

void loop() {
  Serial.println(temp);
  lampo = analogRead(0)/1023.0*5;
  temp = lampo-0.5*100;
  volume = analogRead(analogPin);
 napintila = digitalRead(nappi);
 if (napintila == HIGH) {
  tone (kaiutin, 200);
 }
 else {
   noTone(kaiutin);
 }
 delay (100);
}