const int c0_pin = 2; 
const int s0_pin = 4;
const int s1_pin = 13;




void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

}

void loop() {
  int c0 = digitalRead(c0_pin); 
  int s0 = digitalRead(s0_pin); 
  int s1 = digitalRead(s1_pin); 

  if ((c0 == 0) && (s0 == 0) && (s1 == 0)) {
    Serial.print("Decimal: 0");
  }
  else if ((c0 == 0) && (s0 == 0) && (s1 == 1)) {
    Serial.print("Decimal: 1 ");
  }
  else if ((c0 == 0) && (s0 == 1) && (s1 == 0)) {
    Serial.print("Decimal: 2 ");
  }
  else if ((c0 == 0) && (s0 == 1) && (s1 == 1)) {
    Serial.print("Decimal: 3 ");
  }
  else if ((c0 == 1) && (s0 == 0) && (s1 == 0)) {
    Serial.print("Decimal: 4 ");
  }
  else if ((c0 == 1) && (s0 == 0) && (s1 == 1)) {
    Serial.print("Decimal: 5 ");
  }
  else if ((c0 == 1) && (s0 == 1) && (s1 == 0)) {
    Serial.print("Decimal: 6 ");
  }
  else if ((c0 == 1) && (s0 == 1) && (s1 == 1)) {
    Serial.print("Decimal: 7 ");
  }
}