#include <SevenSeg.h>
SevenSeg number (0,1,2,3,4,5,6);
const int numOfDigits =3;
int digitPins [numOfDigits]={11,12,13};

const int trigPin = 9;
const int echoPin = 10;
long duration;
int distanceCm, distancelnch;
void setup() {
  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);
  number.setDigitPins ( numOfDigits , digitPins );
  number.setCommonAnode();
  number.setDutyCycle(50);
}
void loop() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(10);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distanceCm = duration * 0.0342 / 2;
  distancelnch = duration * 0.0133 / 2;
  number.write(distanceCm);
}