//addition
int addition(int a, int b) {
  int c;
  c = a + b;
  return c;
}

//Soustraction
int soustraction(int a, int b) {
  int d;
  d = a - b;
  return d;
}

//Division
float division(int a, int b) {
  float e;
  e = (float) a / b;
  return e;
}

void setup() {
  pinMode(9, OUTPUT);
  Serial.begin(9600); // Any baud rate should work

}

void loop() {
  int a = 1;
  int b = 3;

  int c;
  int d;
  float e;

  c = addition(a,b);
  d = soustraction(b,c);
  e = division(a,b);

  Serial.print(c);
  Serial.print(" ");
  Serial.print(d);
  Serial.print(" ");
  Serial.println(e);

}