Arduino NANO blinking LED - object oriented version

Blink.ino

/*
  Blink.ino - Marc Quinton
    object oriented version of the classical blinking LED 
 */
 
class Led {
  
private:
 
  int _pin;
  int _status = LOW;

public:
 
  Led(int pin) {
      _pin = pin;
  }
  
  void low(){
     _status=LOW;
     digitalWrite(_pin, LOW);    // turn the LED off by making the voltage LOW
  }

  void high(){
     _status=HIGH;
     digitalWrite(_pin, HIGH);    // turn the LED off by making the voltage LOW
  }

  void setup(void) {
     pinMode(_pin, OUTPUT); 
  }
  
  void blink(int _delay=1000){
     this->high();
     delay(_delay);
     this->low();
     delay(_delay);
  }
};

// Pin 13 has an LED connected on most Arduino boards ; give it a name:
Led led(13);

// the setup routine runs once when you press reset:
void setup() {                
  led.setup();     
}

// the loop routine runs over and over again forever:
void loop() {
  led.blink(100);
}

BlinkHinherited.ino

/*
  Blink.ino - Marc Quinton
    object oriented version of the classical blinking LED 
 */

class Pin {

protected:

  int _pin;
  int _status = LOW;

public:

  Pin(int pin) {
      _pin = pin;
  }

  void low(){
     _status=LOW;
     digitalWrite(_pin, LOW);    // turn the LED off by making the voltage LOW
  }

  void high(){
     _status=HIGH;
     digitalWrite(_pin, HIGH);    // turn the LED off by making the voltage LOW
  }

  void setup(void) {
     pinMode(_pin, OUTPUT); 
  }
 
};

// Led is connected to a Pin.
class Led : public Pin {
  
public:

  Led(int pin) : Pin(pin){
      _pin = pin;
  }

  void blink(int _delay=1000){
     this->high();
     delay(_delay);
     this->low();
     delay(_delay);
  }
};

// Pin 13 has an LED connected on most Arduino boards ; give it a name:
Led led(13);

// the setup routine runs once when you press reset:
void setup() {                
  led.setup();     
}

// the loop routine runs over and over again forever:
void loop() {
  led.blink(100);
  led.blink(100);
  delay(1000);
}