//////////////////////////////////////////
#include "funshield.h"

constexpr int leds[] = { led1_pin, led2_pin, led3_pin, led4_pin };
constexpr int ledCount = sizeof(leds) / sizeof(leds[0]);

constexpr int buttons[] = { button1_pin, button2_pin, button3_pin };
constexpr int buttonCount = sizeof(buttons) / sizeof(buttons[0]);

void setup() {
  // put your setup code here, to run once:
  for (int led : leds) {
    pinMode(led, OUTPUT);
    digitalWrite(led, OFF);
  }
  for (int button : buttons) {
    pinMode(button, INPUT);
  }
}

void loop() {
  // put your main code here, to run repeatedly:
  for (int i =0; i< buttonCount; i++){
    bool pressed = !digitalRead(buttons[i]);
    digitalWrite(leds[i], pressed ? ON : OFF);
  }
}
//////////////////////////////////////////
#include "funshield.h"

constexpr int leds[] = { led1_pin, led2_pin, led3_pin, led4_pin };
constexpr int ledCount = sizeof(leds) / sizeof(leds[0]);

constexpr int buttons[] = { button1_pin, button2_pin, button3_pin };
constexpr int buttonCount = sizeof(buttons) / sizeof(buttons[0]);

void setup() {
  // put your setup code here, to run once:
  for (auto led : leds) {
    pinMode(led, OUTPUT);
    digitalWrite(led, OFF);
  }
  for (auto button : buttons) {
    pinMode(button, INPUT);
  }
}

enum LedState {PRESSED, RELEASED};

class LedSwitcher
{
  public:
    LedSwitcher(int pin) {
      pin_ = pin;
    }
    void switchOnOff(bool button_pressed)
    {
      if (button_pressed == false) {
        prev_state_ = RELEASED;
        return;
      }

      if (prev_state_ == PRESSED && button_pressed)
        return;

      prev_state_ = PRESSED;
      is_on_ = !is_on_;

      digitalWrite(pin_, is_on_ ? ON : OFF);
    }
  private:
    bool is_on_ = false;
    LedState prev_state_ = RELEASED;
    int pin_;
};

LedSwitcher switchers[] { LedSwitcher(led1_pin), LedSwitcher(led2_pin), LedSwitcher(led3_pin) };

void loop() {
  // put your main code here, to run repeatedly:
  for (int i = 0; i < buttonCount; i++) {
    bool pressed = !digitalRead(buttons[i]);
    switchers[i].switchOnOff(pressed);
  }
}
//////////////REFERENCE/////////////////
#include <iostream>

class X
{
public:
    void zdvihniCitac(int& citac) // <<<<< aha ampersand 
    {
        citac++;
    }
};


int main()
{
    X object;

    int citac = 4;
    object.zdvihniCitac(citac);

    std::cout << citac << std::endl; // citac sa zdvihne len ked je pri parametri metody & !!!
}