Compling Error Stray '/' in program (Arduino UNO)

#include <LiquidCrystal.h>
#define NUM_SAMPLES 10

int sum = 0;
unsigned char sample_count = 0;
float voltage = 0.0;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
const int PT = A0;
const int CT = A1;
float Cur;
float Vol;
float Power;

void setup() {
// set up the LCD’s number of columns and rows:
lcd.begin(20, 4);
// Print a message to the LCD.
lcd.setCursor(6,1);
lcd.print(“Welcome To”);
lcd.setCursor(5,2);
lcd.print(“Energy Meter”);
//delay(5000);
lcd.clear();

Constants();
}

void loop() {
lcd.setCursor(0, 2);
ShowVoltage(9, 0, PT);
Vol = voltage;
ShowVoltage(9, 1, CT);
Cur = voltage;
Power = Vol * Cur;
lcd.setCursor(7,2);
lcd.print(Power);
}

void Constants()
{
lcd.setCursor(0,0);
lcd.print(“Voltage: “);
lcd.setCursor(0,1);
lcd.print(“Current: “);
lcd.setCursor(0,2);
lcd.print(“Power: “);
lcd.setCursor(14,0);
lcd.print(“V”);
lcd.setCursor(14,1);
lcd.print(“A”);
lcd.setCursor(12,2);
lcd.print(“W”);
}

void ShowVoltage (int x,int y, unsigned int value)
{
while (sample_count < NUM_SAMPLES)
{
sum += analogRead(value);
sample_count++;
delay(10);
}

voltage = ((float)sum / (float)NUM_SAMPLES * 5.015) / 1024.0;
lcd.setCursor(x, y);
lcd.print(voltage);
sample_count = 0;
sum = 0;
}

It compiles fine for me. I think there was a hidden bad character in the code that caused the error. Try clicking the select button on the code below and then paste it into a new sketch:

#include <LiquidCrystal.h>
#define NUM_SAMPLES 10

int sum = 0;
unsigned char sample_count = 0;
float voltage = 0.0;

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
const int PT = A0;
const int CT = A1;
float Cur;
float Vol;
float Power;

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(20, 4);
  // Print a message to the LCD.
  lcd.setCursor(6, 1);
  lcd.print("Welcome To");
  lcd.setCursor(5, 2);
  lcd.print("Energy Meter");
  //delay(5000);
  lcd.clear();

  Constants();
}

void loop() {
  lcd.setCursor(0, 2);
  ShowVoltage(9, 0, PT);
  Vol = voltage;
  ShowVoltage(9, 1, CT);
  Cur = voltage;
  Power = Vol * Cur;
  lcd.setCursor(7, 2);
  lcd.print(Power);
}

void Constants()
{
  lcd.setCursor(0, 0);
  lcd.print("Voltage: ");
  lcd.setCursor(0, 1);
  lcd.print("Current: ");
  lcd.setCursor(0, 2);
  lcd.print("Power: ");
  lcd.setCursor(14, 0);
  lcd.print("V");
  lcd.setCursor(14, 1);
  lcd.print("A");
  lcd.setCursor(12, 2);
  lcd.print("W");
}

void ShowVoltage (int x, int y, unsigned int value)
{
  while (sample_count < NUM_SAMPLES)
  {
    sum += analogRead(value);
    sample_count++;
    delay(10);
  }

  voltage = ((float)sum / (float)NUM_SAMPLES * 5.015) / 1024.0;
  lcd.setCursor(x, y);
  lcd.print(voltage);
  sample_count = 0;
  sum = 0;
}

In the future please post code using the code tags(</> button) and also post the full error output(click on the Copy error messages button on the right side of the orange bar and then paste it) also using code tags. Also, always use Tools > Auto Format which will make your code easier for us to read and will help you to find bugs. You see how much better that is?