const int joystick_x_pin = A2;	
const int joystick_y_pin = A1;

void setup()
 {
  Serial.begin(9600);   
}

void loop()
 {
  int x_adc_val, y_adc_val; 
  float x_volt, y_volt;
  x_adc_val = analogRead(joystick_x_pin);  
  y_adc_val = analogRead(joystick_y_pin);
  x_volt = ( ( x_adc_val * 5.0 ) / 1023 ); 
  y_volt = ( ( y_adc_val * 5.0 ) / 1023 );  
  Serial.print("X_Voltage = ");
  Serial.print(x_volt);
  Serial.print("\t");
  Serial.print("Y_Voltage = ");
  Serial.println(y_volt);
  delay(100);
}