#include <HCSR04.h>

HCSR04 hc(5, 6); //initialisation class HCSR04 (trig pin , echo pin)

void setup()
{ Serial.begin(9600); }

void loop()
{
    Serial.println( hc.dist() ); //return current distance (cm) in serial
    delay(60);                   // we suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal.
}

#include <HCSR04.h>

HCSR04 hc(2, new int[6]{5, 6, 7, 8, 9, 10}, 6); //initialisation class HCSR04 (trig pin , echo pin, number of sensor)

void setup()
{ Serial.begin(9600); }

void loop()
{
    for (int i = 0; i < 6; i++ )
        Serial.println( hc.dist(i) ); //return curent distance (cm) in serial for sensor 1 to 6
    delay(60);                        // we suggest to use over 60ms measurement cycle, in order to prevent trigger signal to the echo signal.
}