#include <Keypad.h>
#include <LiquidCrystal.h>
#define len 5

LiquidCrystal lcd (8,9,10,11,12,13); // e,rs,d4,d5,d6,d7 value

const byte rows = 4;
const byte cols = 4;

char key[rows[cols]]={
  {'7','8','9','A'},
  {'4','5','6','B'},
  {'1','2','3','C'},
  {'C','0','=','D'}
  

};
byte rowPins[rows]={0,1,2,3};
byte colPins[cols]={4,5,6,7};
char user[len];
char password[len]="1234";
byte count= 0 ;
char key;

Keypad customkeypad(makeKeymap(keys),rowPins,colPins,rows,cols)

void setup()
{
  lcd.begin(16,2);
  lcd.print("Initialzing...");
  delay(1000);
  lcd.clear();
}

void loop()
{
  lcd.setCursor(0,0);
  lcd.print("Enter Password :");
  key=customkeypad.getKey();
  
  if(key){
    user[count]=key;
    lcd.setCursor(count , 1);
    lcd.print(user[count]);
    count++;
  }
  if(count=len-1)
  {
    if(!strcmp(user,password))
    {
      lcd.clear();
      lcd.print("Password Matched");
      delay(1000);
      count = 0;
    }
    else{
      lcd.clear();
      lcd.print("Wrong Password!!");
      delay(1000);
      count = 0;
    }
  }
}