Arduin0_keypad input password and shows on LCD

gistfile1.c

// 引用 Keypad library
#include <Keypad.h>
#include <Password.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,16,2); 
char *pwd={"123"};
Password password = Password(pwd); 
// 3x4 Keypad
const byte ROWS = 4; // 4 Rows
const byte COLS = 4; // 3 Columns

// 定義 Keypad 的按鍵
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

// 定義 Keypad 連到 Arduino 的接腳
byte rowPins[ROWS] = { 9 , 8 , 7 , 6}; // 連到 Keypad 的 4 個 Rows: Row0, Row1, Row2, Row3 
byte colPins[COLS] = {10, 11 , 12, 13};   // 連到 Keypad 的 3 個 Columns: Column0, Column1, Column2

// 建立 Keypad 物件
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
void setup(){
  Serial.begin(9600);
  delay(200);
  pinMode(2, OUTPUT);  //green light
  pinMode(3, OUTPUT);  //red light
  lcd.init();
  lcd.backlight();
  lcd.print(pwd);
  lcd.setCursor(0, 1);
  keypad.addEventListener(keypadEvent); //add an event listener for this keypad
  }

void loop(){
  keypad.getKey();
  }
  //take care of some special events
int lcdp=0;
void keypadEvent(KeypadEvent eKey){
  switch (keypad.getState()){
  case PRESSED:
  lcd.setCursor(lcdp, 1);
  delay(10);
 
  switch (eKey){
    case 'A': 
      checkPassword(); 
      delay(1); 
      break;
   
    case 'B': 
      password.reset();
      lcd.clear();
      lcdp=0; 
      lcd.setCursor(0, 0);
      lcd.print(pwd);
      delay(1); 
      break;
   
    default: 
      password.append(eKey); 
      lcd.print(eKey);
      lcdp++;
      delay(1);
   }
   }
}

void checkPassword(){ 
    if (password.evaluate()){  
    lcd.print("Accepted");
    delay(10);
    digitalWrite(2, HIGH);//turn on
    delay(2000); //wait 5 seconds
    digitalWrite(2, LOW);// turn off
    lcd.clear();
    lcdp=0;
    lcd.setCursor(0, 0);
    lcd.print(pwd);
    }else{
    lcd.print("Denied");
    delay(10);
    digitalWrite(3, HIGH); //turn on
    delay(2000); //wait 5 seconds
    digitalWrite(3, LOW);//turn off
    lcd.clear();
    lcdp=0;
    lcd.setCursor(0, 0);
    lcd.print(pwd);
}
}