#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
String question[] = {"1.Nickname?", "2.Age?", "3.Birthday?",
                     "4.CloseFreind?", "5.FavoriteFood?"
                    };
String answer[] = {""};
int count = 0;
void setup() {
  Serial.begin(9600);
  // คำสั่งเริ่มต้นการทำงานของจอ lcd
  lcd.init();
  // คำสั่งแสดงไฟ backlight สีเขียวอ่อนของจอ
  lcd.backlight();

  intro();
}

void loop() {
  showQ();
  getSerial();
  showQ&A();
}

void getSerial() {
  if (Serial.available() > 0) {
    String str = Serial.readString();
    str.trim();
    //ทำตรงอีกนิดนึงก็เสร็จแล้ว
  }
}

void showQ() {
  if (count == 0) {
    lcd.setCursor(0, 0);
    lcd.print(question[0]);
    delay(5000);
    lcd.clear();
  } else if (count == 1) {
    lcd.setCursor(0, 0);
    lcd.print(question[1]);
    delay(5000);
    lcd.clear();
  } else if (count == 2) {
    lcd.setCursor(0, 0);
    lcd.print(question[2]);
    lcd.clear();
  } else if (count == 3) {
    lcd.setCursor(0, 0);
    lcd.print(question[3]);
    lcd.clear();
  } else if (count == 4) {
    lcd.setCursor(0, 0);
    lcd.print(question[4]);
    lcd.clear();
  }
}

void intro() {
  // การตั้งค่าตำแหน่งข้อความที่จะแสดงบนจอ lcd
  lcd.setCursor(0, 0);
  lcd.print("Q & A");
  lcd.setCursor(0, 1);
  lcd.print("101 & 102");
  delay(4000);
  lcd.clear();
}

void showQ&A() {
  if (count > 4) {
    for (int i = 0; i <= 4; i++) {
      lcd.setCursor(0, 0);
      lcd.print(question[i]);
      lcd.setCursor(0, 1);
      lcd.print(answer[i]);
      delay(4000);
      lcd.clear();
    }
  }
}