Project 2 - Measuring the distance of an object using ultrasonic sensor and also smoothen the sensor data using moving average filter

//MASTER
#include<Wire.h>// we are getting the I2C protocol
const int pin =7;//seting pin 7 as signal pin
long sum =0;//declaring all the global variable
long avg;
byte send;
void setup()
{
Serial.begin(9600);
Serial.begin(9600);//baud rate for transmission
Wire.begin();//begin communication for i2c in a4 and a5
}
void loop()
{
//Wire.requestFrom(8,1);
long time ,inch ,cm;
long result;
pinMode(pin,OUTPUT);//makeing pin 7 as output
digitalWrite(pin,LOW);//making low for some time
delayMicroseconds(2);
digitalWrite(pin,HIGH);//making that pin has high
delayMicroseconds(2);
digitalWrite(pin,LOW);//making it has low
pinMode(pin,INPUT);
time=pulseIn(pin,HIGH);//getting the retrun wave noted in the time
result=conversion(time);//calling the function
cm=(result/2)/29.1;//value from function part are calculated for the CM
inch=(result/2)/74;//value from function part are calculated for the Inches

Serial.println("inch");
Serial.println(inch);
//Serial.println("inch");
// Serial.println(inch);
// Serial.println("cm");
// Serial.println(cm);

Wire.beginTransmission(8);
Wire.write(inch);//Transmitting the value to slave
Wire.endTransmission();
delay(500);
}
long conversion( long time)
{
int a[5];//intializing the variable
int n;
int av=0;
while(n<=5)
{
a[n] = time;//storing the value in array upto window size as 5
n++;
}
for(int i=0;i<5;i++)
{
av=av+a[i];
}
av=av/5;//geeting the average value
return av;//returning that value
}