Using library in a class

Projects Programming
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Hello everyone , I'm trying to use sharp Ir library inside .cpp file so when I call a function from that class it will read my Ir sensors.Any suggestion on how to do it ?. Below I posted my code for the .cpp and .h files.

#ifndef SENSORCONTROLLER_CPP
#define SENSORCONTROLLER_CPP
#include "SensorController.h"

SharpIR Centersensor( SharpIR::GP2Y0A41SK0F, A1 );
SharpIR Leftsensor( SharpIR::GP2Y0A41SK0F, A2 );
SharpIR Rightsensor( SharpIR::GP2Y0A41SK0F, A0 );
Encoder SensorController::leftEncoder = Encoder(3, 7);
Encoder SensorController::rightEncoder = Encoder(2, 8); 

int SensorController::RightS;
int SensorController::LeftS;
int SensorController::CenterS;

void SensorController::IrReading(){
 RightS=Rightsensor.getDistance();
 LeftS=Leftsensor.getDistance();
 CenterS= Centersensor.getDistance();
}

void SensorController::printSensors(){
 Serial.print("L: ");
 Serial.print(leftEncoder.read());
 Serial.print(" R: ");
 Serial.print(SensorController::RightS);
 Serial.print(" C: ");
 Serial.println(CenterS);}
#endif

//Sensors Object that Includes the two Encoders and three Ir Sensors 
#ifndef SENSORCONTROLLER_H
#define SENSORCONTROLLER_H
#include "Arduino.h"
#include "const.h"
#include <Encoder.h>
#include <SharpIR.h>
namespace SensorController {
 
extern int RightS;
extern int LeftS;
extern int CenterS;
  extern Encoder leftEncoder;
  extern Encoder rightEncoder;
  void IrReading();
  void printSensors();
}
#endif

when I call the printsensors function , I get zero values for the sensor I don't why