Pointer to function in class

Projects General Guidance
4

This version compiles without error or warning and seems to produce reasonable output:

class InputPeripherals
{
  public:
    InputPeripherals();
    void init(int buttonAdress, void (*funkce) (byte number));
    void updateClass();
  private:
    int _pin;
    void (*_fooShowNumber) (byte number);
};

class OutputPeripherals
{
  public:
    OutputPeripherals();
    void init();         // !!! správně by tady mělo být vkládání pole(_leds[8] ale pro zjednodušení jsem ho vynechal
    static void number(byte number);
  private:
    static int _leds[8];
};


InputPeripherals buttonA;
OutputPeripherals leds;

void setup()
{
  delay(20);
  Serial.begin(115200);
  delay(20);
  Serial.println("\nTransfer started \n\n");
  leds.init();
  leds.number(5);
  buttonA.init(12, OutputPeripherals::number);
}

void loop()
{
  buttonA.updateClass();
  delay(500);
  leds.number(8);
  delay(500);
  Serial.print("end loop\n\n");
  delay(10000);
}


InputPeripherals::InputPeripherals() {}

void InputPeripherals::init(int buttonAdress, void (*foo) (byte number))
{
  Serial.println("Output set INPUT_PULLUP");
  pinMode(buttonAdress, INPUT_PULLUP);
  _pin = buttonAdress;
  _fooShowNumber = foo;
}

void InputPeripherals::updateClass()
{
  Serial.print("Button value is: ");
  Serial.println(digitalRead(_pin));
  if (digitalRead(_pin) == 0)
  {
    Serial.println("calling 3");
    _fooShowNumber(3);
  }
  else
  {
    Serial.println("calling 1");
    _fooShowNumber(1);
  }
}

int OutputPeripherals::_leds[8] = {3, 4, 5, 6, 7, 8, 9, 10};

OutputPeripherals::OutputPeripherals() {}

void OutputPeripherals::init()
{
  for (int i = 0; i < 8; i++)
  {
    pinMode(_leds[i], OUTPUT);
  }
}

void OutputPeripherals::number(byte number)
{
  Serial.print("Incomming number: ");
  Serial.println(number);

  for (int i = 0; i < 8; i++)
  {

    digitalWrite(_leds[i], number & (0x01 << i));
  }
}