// Program: 1C Ex3 Q1 Chan Tai Ming.ino
/*
   Exercise 3
   Experience with Serial input,
   select "Newline" option for Serial Monitor
   type a character within the upmost bar, then press ENTER

   Learn to use if else
*/

void setup()
{
  // Initialize serial and wait for port to open
  Serial.begin(115200);
  while (!Serial)
  {
    // Wait for serial port to connect, needed for native USB port only
  }
  Serial.println("Please input a character:");
}

void loop()
{ 
  char a;

  while (Serial.available())
  {
    a = Serial.read();
    // delay(10);      // comment out when using ESP32
                    // serial data comes in very slowly compared to
                    // how fast the Arduino runs
    Serial.read();  // the second read is the new line \n

    // if ((a >= '0') && ( a <= '9'))
    // {
    //   Serial.print("You have input a digit: ");
    //   // Serial.println(a);
    //   // Serial.println();
    //   // Serial.println("Please input a character:");
    // }
    // else if ((a >= 'A') && ( a <= 'Z')) {
    //   Serial.print("You have input an uppercase: ");
    //   // Serial.println(a);
    //   // Serial.println();
    //   // Serial.println("Please input a character:");
    // }
    // else if ((a >= 'a') && ( a <= 'z')) {
    //   Serial.print("You have input a lowercase: ");
    //   // Serial.println(a);
    //   // Serial.println();
    //   // Serial.println("Please input a character:");
    // }
    // else {
    //   Serial.print("You have input an other: ");
    //   // Serial.println(a);
    //   // Serial.println();
    //   // Serial.println("Please input a character:");
    // }

    switch (a) {
      // case 48 ... 57:   // Duplicated !!
      // case '0' ... '9': Serial.print("You have input a digit: ");
      case '0' ... 57: Serial.print("You have input a digit: ");
        break;
      case 65 ... 90: Serial.print("You have input an uppercase: ");
        break;
      case 97 ... 122: Serial.print("You have input a lowercase: ");
        break;
      default: Serial.print("You have input an other: ");
        break;
    }

    Serial.println(a);
    Serial.println();
    Serial.println("Please input a character:");
  }
}