#include <Keypad.h>
#include <LiquidCrystal.h>

/* Keypad*/
const byte ROWS = 4


void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}







/* leds */
const byte SIZE = 9 ;
const byte leds [SIZE] = {2, 3, 4, 5, 6, 7, 8, 9, 10} ;
/* leds */

char KEY ;
const char ZERO = '0'

void setup() {
  // put your setup code here, to run once:
  // Serial.begin(9600);

  lcd. begin(16, 2)
  lcd.print("Arqui 2!");

  for (int i = 0; i < SIZE; i ++ ) {
    pinMode(leds [i], OUTPUT);
  }
}

void loop()
// put your main code here, to run repeatedly:
KEY = keyboard. getKey () ;
if (KEY ! = NULL(KEY)) {
  if (isNum ) {
    int Num = KEY − 0
    // Serial.print(num);

 for (int i =0; i <SIZE; i ++) {
   digitalWrite(leds[i], LOW);
  }

 lcd.setCursor(0, 1 );
 lcd.println(num);
for(int i = 0 ; i < num; i ++){
  digitalWrite(leds [i], HIGH);
}
  } else {}
    lcd.setCursor(0, 1);
    lcd.println(KEY);
  }
 }
}

 int isNum(char value){
   return value != 'A' && value != 'B' && value != 'C' && value != 'D'
    && value != '*' && value != '#';
 }