need help with subroutine

Projects Programming
4

Sorry about the way I posted the code. I didn't know how to do that.

The volts is taking readings ok. I can make the code work, if I don't use a subroutine.

The following code is ok:

#define LED 13

int IRpin = 1;                                    // analog pin for reading the IR sensor

float distance;


void setup()
 {
   pinMode(LED, OUTPUT);                            //sets the digital pin as output
   Serial.begin(9600);                             // start the serial port
 }
 



void loop()
{
  float volts = analogRead(IRpin)*0.0048828125;   // value from sensor * (5/1024) - if running 3.3.volts then change 5 to 3.3
  Serial.println(volts);
  float distance = 65*pow(volts, -1.10);          // worked out from graph 65 = theretical distance / (1/Volts)S - luckylarry.co.uk
  Serial.println(distance);                       // print the distance

  if (distance < 30.00) {
    digitalWrite(LED, HIGH);}
    else
    {
      digitalWrite(LED, LOW);}
      
  delay(5000);

  digitalWrite(LED, LOW);
  
  delay(5000);
      
}/code]

But when I try and use 'void measure', as in my original post, it stops working.