Password Ar

#include <string.h>
#include <LiquidCrystal.h>

void printLcd(String, String);
char Comp(char* This);

char password[] = "Hope";
char input[16];

int igual = 0;
bool justChecked = false;

const int ledGreen = 6;
const int ledRed = 7;
const int buzzer = 8;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.begin(16, 2);
  printLcd(":<","ENTER PASSWORD");
  pinMode(ledGreen, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(ledRed, OUTPUT);
  Serial.begin(9600);
}


void loop() {

  if(Serial.available() > 0) {
    igual = Comp(password);
    justChecked = true;
  } else {
    justChecked = false;
    igual = 0;
  }

  if(igual) {
    printLcd("CORRECT","ACCES GRANTED");
    digitalWrite(buzzer, HIGH);
    delay(200);
    digitalWrite(buzzer, LOW);
    digitalWrite(ledGreen, HIGH);
    digitalWrite(ledRed, LOW);
  } else if (justChecked) {
    printLcd("WRONG PASSWORD","TRY AGAIN");
    digitalWrite(ledRed, HIGH);
    digitalWrite(ledGreen, LOW);
  }
  delay(100);
}

char Comp(char This[30]) {
    int cont = 0;
    int tamanho = 0;
    while (Serial.available() > 0)
    {
      input[cont] = Serial.read();
      cont++;
    }
    input[cont] = '\0';

    if (strcmp(input,This)  == 0) {
        return(1);
    }
    else {
        return(0);
    }
}

void printLcd(String first, String second) {
  lcd.clear();
  lcd.print(first);
  lcd.setCursor(0,1);
  lcd.print(second);
}