Feb 12, 2007
Simple quiz
Basic idea is to ask quenstions from usen and whether the answer is right – green led will light up or if the answers wrong – red led will light up. It also counts the amount of right answers. It’s easy to continue quiz with further questions since right now there’s only one. 
Pii Paappanen
The code:
//Questionnaire by Pii Paappanen 2007
//Thanks to Miska for the if-answered routine and
//* SERIAL COM – HANDELING MULTIPLE BYTES inside ARDUINO – 01_simple version
//by beltran berrocal
int serIn; //var that will hold the bytes in read from the serialBuffer
int ledPin13 = 13; // LED connected to digital pin 13
int ledPin12 = 12; // LED connected to digital pin 12
int question_answered = 1; // whether the question’s answered or not
void setup() {
beginSerial(9600);
pinMode(ledPin13, OUTPUT); // sets the digital pin as output
pinMode(ledPin12, OUTPUT); // sets the digital pin as output
}
//auto go_to_the_line function
void printNewLine() {
printByte(13);
printByte(10);
}
void loop () {
char name = (‘x’);
int age = (0);
//simple feedback from Arduino
if (question_answered == 1)
{
printString(“What is the name of president of Finland? \n”);
printString(“Is it A: Tarja \n”);
printString(“or is it B: Juho-kusti \n”);
question_answered = 0;
}
printNewLine();
// only if there are bytes in the serial buffer execute the following code
if(serialAvailable()) {
//inform that Arduino heard you saying something
printString(“You answered: “);
//keep reading and printing from serial untill there are bytes in the serial buffer
while (serialAvailable() > 0 ) {
name = serialRead(); //read Serial
Serial.println(name);
if (name == ‘A’) {
digitalWrite(ledPin12, HIGH); // sets the LED on
Serial.println(“Right! \n”);
delay (2000);
digitalWrite(ledPin12, LOW);
// indicates that the question has been answered
question_answered = 1;
}
else {
Serial.println(name);
digitalWrite(ledPin13, HIGH); // sets the LED on
Serial.println(“Wrong! \n”);
delay (2000);
digitalWrite(ledPin13, LOW);
}
}
}
}