#define LED_BLAU 8
#define TASTER 11
#define MAX_ARRAY 100

int Array[MAX_ARRAY];
int Flankenmerker;
int Intervall;
unsigned long Time;
int Zaehler;
long randomnumber;
int gerade;
int ungerade;
int Toggle;

void setup() {
  Serial.begin(9600);
  pinMode(LED_BLAU, OUTPUT);
  pinMode(TASTER, INPUT_PULLUP);
  Flankenmerker = 0;
  Intervall = 3000;
  Zaehler = 0;
  Time = millis();
}

void loop() {
  // randomnumber = random(1,100);

  if (millis() - Time >= Intervall) {
    Toggle = !Toggle;
    digitalWrite(LED_BLAU, Toggle);
    for (int i = 0; i < MAX_ARRAY; i++) {
      Array[i] = random(1, 100);
    }
    Time = millis();
  }

  if (digitalRead(TASTER) == LOW && Flankenmerker == 0) {
    geradeungerade();
    Serial.println("Auswertung:");
    Serial.println("-----------");
    Serial.print("Maximum:  ");
    Serial.print(maximum());
    Serial.print("      ;");
    Serial.print("Minimum:  ");
    Serial.println(minimum());
    Serial.print("Anz.gerade:  ");
    Serial.print(gerade);
    Serial.print("  ;");
    Serial.print("Anz.ungerade:  ");
    Serial.println(ungerade);
    Haeufigkeit();
    Flankenmerker = 1;
    delay(20);
  }
  if (digitalRead(TASTER) == HIGH)
    Flankenmerker = 0;
  delay(20);
}

int maximum() {
  int maximum = 0;
  for (int i = 0; i < MAX_ARRAY; i++) {
    if (Array[i] > maximum) {
      maximum = Array[i];
    }
  }
  return maximum;
}

int minimum() {
  int minimum = 0;
  for (int i = 0; i > MAX_ARRAY; i++) {
    if (Array[i] < minimum) {
      minimum = Array[i];
    }
  }
  return minimum;
}

void geradeungerade() {
  int geradeerg = 0;
  int ungeradeerg = 0;
  for (int i = 0; i < MAX_ARRAY; i++) {
    if (Array[i] % 2 == 0) {
      geradeerg++;
    } else {
      ungeradeerg++;
    }
  }
  ungerade = ungeradeerg;
  gerade = geradeerg;
}
void Haeufigkeit() {
  int Haeufigkeit[MAX_ARRAY];
  int maxval = 0;

  for (int i = 0; i < MAX_ARRAY; i++) {
    Haeufigkeit[Array[i]]++;
  }
  for (int i = 0; i < MAX_ARRAY; i++) {
    if (Haeufigkeit[i] > maxval)
      maxval = Haeufigkeit[i];
  }
  for (int i = maxval; i >= 0; i--) {
    Serial.print("Anzahl: ");
    Serial.print(i);
    Serial.print("; Zahl: ");
    for (int j = 0; j < MAX_ARRAY; j++) {
      if (Haeufigkeit[j] == i)
      {
        Serial.print(j);
        Serial.print(",");
      }
    }
    Serial.println();
  }
}