Sketch - fehlermeldung "expected initializer before 'switch'"

[Sisor]

Hi wendtdir,

ich hatte grade mal wieder Lust auf C++ schreiben. Daher hab ich deinen Code mal umgebaut und ein paar grundlegende Programmierregeln umgesetzt.
Was ich da gemacht habe, und warum? - Das darfst du dir gerne selber erarbeiten  .

#include <LiquidCrystal.h>  
#include <IRremote.h>

const byte ANALOG_PIN_TEMP =  0;
const byte PIN_MOVEMENT    =  2;
const byte PIN_RECEIVER    =  3; 
const byte PIN_LED_GREEN   = 11;
const byte PIN_LED_RED     = 12;
enum {CODE_TASTE1 = 16724175, 
      CODE_TASTE2 = 16743045};
const int  MESSAGE_EINDRINGLING_DURATION = 3000;      
LiquidCrystal lcd(4,5,6,7,8,9);    
IRrecv irrecv(PIN_RECEIVER); 


volatile boolean movementDetected = false;


void setup() { 
  lcd.begin(16,2);
  lcd.clear();
  pinMode(PIN_MOVEMENT,  INPUT);
  pinMode(PIN_LED_GREEN, OUTPUT);
  pinMode(PIN_LED_RED,   OUTPUT);
  digitalWrite(PIN_LED_RED,   LOW);
  digitalWrite(PIN_LED_GREEN, LOW);
  irrecv.enableIRIn();
  Serial.begin(9600);
  Serial.println("Start");
}

void ISR_OnMovement() {
  movementDetected = true;
}

void printEindringling() {
  lcd.setCursor(0, 0);
  lcd.print("Eindringling");
  lcd.setCursor(0, 1);
  lcd.print("erkannt");
}

void printTemperatur(float celsius) {
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Temperatur:");
  lcd.setCursor(0,1);
  lcd.print(celsius,0);
  lcd.setCursor(3,1);
  lcd.print("Grad");
}

float analog2celsius(float analogValue) {
  float voltage = analogValue*5000/1023 - 500;
  float celsius = voltage / 10;
  return celsius;
}

void loop() { 
  decode_results results;
  static unsigned long detectionMoment = -MESSAGE_EINDRINGLING_DURATION-1;
  
  if (movementDetected) {   
    digitalWrite(PIN_LED_RED, HIGH);
    printEindringling();
    Serial.println("1");
    detectionMoment = millis();
    movementDetected = false;
  }   

  if (irrecv.decode(&results)) {
    irrecv.resume();
    switch(results.value) { 
      case CODE_TASTE1:
        digitalWrite(PIN_LED_GREEN, HIGH);
        attachInterrupt(0, ISR_OnMovement, RISING);
        Serial.println("2");
        break;
      case CODE_TASTE2:
        digitalWrite(PIN_LED_GREEN, LOW);
        detachInterrupt(0);
        Serial.println("3");
        break;
    }
  }

  boolean messageTimeExpired = millis()-detectionMoment > MESSAGE_EINDRINGLING_DURATION;
  if (messageTimeExpired ) {
    digitalWrite(PIN_LED_RED, LOW);
    float celsius = analog2celsius(analogRead(ANALOG_PIN_TEMP));
    printTemperatur(celsius);
    detectionMoment = millis()-MESSAGE_EINDRINGLING_DURATION-1; // Meldung nach 49 Tagen vermeiden
  }
}