Error while running the resistance and LCD code together

This is my code which I have programmed for resistance calculation using LCD.
Kindly help me to rectify the problem.

//LCD config
#include <Wire.h>
#include <LiquidCrystal.h>
//LiquidCrystal_I2C lcd(0x27,20,4); //sometimes the address is not 0x3f. Change to 0x27 if it dosn't work.
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

unsigned long int milli_time;

const int sensorPin = A0;
const int sensorValue = 0;
const float Vin = 5;
const float Vout = 0;
const float Rref = 1000; // Reference resistor's value in ohms (you can give this value in kiloohms or megaohms - the resistance of the tested resistor will be given in the same units)
const float R = 0;

void setup()
{
lcd.begin(9600);
lcd.print("CLEARDATA");

lcd.begin(16,2);
// lcd.backlight();
}

void loop()
{

// milli_time = millis();
sensorValue = analogRead(sensorPin);
Vout = (Vin * sensorValue) / 1023;
R = Rref * (1 / ((Vin / Vout) - 1));
lcd.setCursor(0,0);
lcd.print("DATA,TIME,");
//lcd.print(milli_time);
//lcd.print(",");
lcd.setCursor(0,1);
lcd.print("R: ");
//lcd.println(R);

delay(1000); //

lcd.setCursor(4,3);
lcd.print("Resistance");
while (micros() % 1000 != 0);
}

const int sensorValue = 0;       
...
  sensorValue = analogRead(sensorPin);

Oops.

Please remember to use code tags when posting code