/*
  IntegerInput by m. Ray Burnette - PUBLIC DOMAIN EXAMPLE
  Maple Mini: Compiled under Arduino 1.6.0rc1
    Sketch uses 15,624 bytes (14%) of program storage space. Maximum is 108,000 bytes.
    Global variables use 3,704 bytes of dynamic memory.
*/

#define BAUD 9600
#define timeoutPeriod 2147483647    // Long time... about 25 days

int a;
int b;

void setup()
{
  // initialize the digital pin as an output.
  pinMode(33, OUTPUT);
  Serial.begin(BAUD);  // BAUD has no effect on USB serial: placeholder for physical UART
  Serial.setTimeout(timeoutPeriod); // default is 1 second
  // wait for serial monitor to be connected.
  while (!(Serial.isConnected() && (Serial.getDTR() || Serial.getRTS())))
  {
    digitalWrite(33,!digitalRead(33));// Turn the LED from off to on, or on to off
    delay(100);         // fast blink
  }
}

void loop()
{
    Serial.println("Enter first integer: ");
    a = Serial.parseInt();
    Serial.print("a = ");
    Serial.println(a);


    Serial.println("Enter second integer: ");
    b = Serial.parseInt();
    Serial.print("b = ");
    Serial.println(b);

    Serial.print("Sum a + b =");
    Serial.println( a + b);
    Serial.print("Dif a - b =");
    Serial.println(a - b);
}