motorconfig.h

extern vex::motor testMotor;

motorObject.cpp

#ifndef VEX_H
#define VEX_H
#include "vex.h"
#endif

#include "motorObject.h"

using namespace vex; 
using namespace std; 

//Sets motor (and ratio)
cMotor::cMotor(motor& sMotor, int Driver, int Driven){
  vMotor = sMotor;
  setRatio(Driver, Driven);
}

//Sets ratio
void cMotor::setRatio(int Driver, int Driven){
  driver = Driver;
  driven = Driven;
}
//Sets position
void cMotor::setPos(double degrees){
  vMotor.setPosition(degrees * (driven / driver), rotationUnits::deg);
}
//Gets position
double cMotor::getPos(){
  return vMotor.position(rotationUnits::deg) / (driven / driver);
}

motorObject.h

//VEX Header Guard
#ifndef VEX_H
#define VEX_H
#include "vex.h"
#endif

#include "motor-config.h"

//motorObj Library Header Guard
#ifndef motorObj_H
#define motorObj_H

class cMotor
{
  private:
    vex::motor vMotor;
    double driver;
    double driven;
  public:
    cMotor(motor& sMotor, int Driver, int Driven);

    void setRatio(int Driver, int Driven);
    void setPos(double degrees);
    double getPos();
};

#endif

setup.cpp

#include "vex.h"
#include "motorObject.h"

cMotor testMotor(EFL, 3, 1);