Avarage readings smoothing Arduino

const int numReadings = 10;         // Total number of readings to use for avaraging / smoothing

int readings;                       // the readings from the analog input
int readIndex = 0;                  // the index of the current reading
int total = 0;                      // the running total
int average = 0;                    // the average

int inputPin = A0;

void setup() {
  Serial.begin(9600);               // initialize serial communication with computer:
  for (int thisReading = 0; thisReading < numReadings; thisReading++) {
    readings = 0;                   // initialize all the readings to 0:
  }
}

void loop() {
  total = total - readings;         // subtract the last reading:

  readings = analogRead(inputPin);  // read the desired data from your sensor here...

  total = total + readings;         // add the reading to the total:
  readIndex = readIndex + 1;        // advance to the next position in the array:

  if (readIndex >= numReadings) {   // if we're at the end of the array...
    readIndex = 0;                  // ...wrap around to the beginning:
  }

  average = total / numReadings;    // calculate the average:

  Serial.println(average);          // Print to serial monitor
  delay(1);                         // delay in between reads for stability
}