// Pin definitions
const int buttonPin1 = 7; // Pin untuk tombol A0
const int buttonPin2 = A1; // Pin untuk tombol A1
const int buttonPin3 = A2; // Pin untuk tombol A2
const int buzzerPin = 2;  // Pin untuk buzzer

// Variables to store the state of the buttons
bool buttonState1 = false;
bool buttonState2 = false;
bool buttonState3 = false;

// Debounce time in milliseconds
const unsigned long debounceDelay = 50;
unsigned long lastDebounceTime1 = 0;
unsigned long lastDebounceTime2 = 0;
unsigned long lastDebounceTime3 = 0;

// Function to read the button state with debouncing
bool readButton(int pin, bool &lastState, unsigned long &lastTime) {
  bool currentState = digitalRead(pin);
  if (currentState != lastState) {
    lastTime = millis();
  }
  if ((millis() - lastTime) > debounceDelay) {
    if (currentState != lastState) {
      lastState = currentState;
    }
  }
  return lastState;
}

void setup() {
  // Initialize the pushbutton pins as inputs:
  pinMode(buttonPin1, INPUT);
  pinMode(buttonPin2, INPUT);
  pinMode(buttonPin3, INPUT);
  
  // Initialize the buzzer pin as an output:
  pinMode(buzzerPin, OUTPUT);

  // Start with the buzzer off
  digitalWrite(buzzerPin, LOW);
}

void loop() {
  // Read the state of the pushbuttons with debouncing
  buttonState1 = readButton(buttonPin1, buttonState1, lastDebounceTime1);
  buttonState2 = readButton(buttonPin2, buttonState2, lastDebounceTime2);
  buttonState3 = readButton(buttonPin3, buttonState3, lastDebounceTime3);
  
  // Check if any of the buttons is pressed
  if (buttonState1 || buttonState2 || buttonState3) {
    // Turn buzzer on
    digitalWrite(buzzerPin, HIGH);
  } else {
    // Turn buzzer off
    digitalWrite(buzzerPin, LOW);
  }
}