Accelerometer.cpp

#include <memory>
#include <iostream>

struct Acceleration
{
    float x;
    float y;
    float z;
};

class Accelerometer
{
public:
    virtual Acceleration acceleration() = 0;

    virtual ~Accelerometer() = default;
};


class MPU6050Accelerometer: public Accelerometer
{
public:
    MPU6050Accelerometer(int fd): _fd(fd)
    {
    }

    ~MPU6050Accelerometer()
    {
        std::cout << "~MPU6050Accelerometer" << std::endl;
    }

    Acceleration acceleration();

private:
    int _fd;
};


Acceleration MPU6050Accelerometer::acceleration()
{
    Acceleration acc;

    //...
    // acc.x = ...;
    // acc.y = ...;
    // acc.z = ...;

    std::cout << "MPU6050Accelerometer::accelerate()" << std::endl;

    return acc;
}


class SomeOtherAccelerometer: public Accelerometer
{
public:
    SomeOtherAccelerometer()
    {
    }

    ~SomeOtherAccelerometer()
    {
        std::cout << "~SomeOtherAccelerometer" << std::endl;
    }

    Acceleration acceleration();
};


Acceleration SomeOtherAccelerometer::acceleration()
{
    Acceleration acc;

    //...
    // acc.x = ...;
    // acc.y = ...;
    // acc.z = ...;

    std::cout << "SomeOtherAccelerometer::accelerate()" << std::endl;

    return acc;
}


int main(int argc, char* argv[])
{
    std::shared_ptr<Accelerometer> pAcc(std::make_shared<MPU6050Accelerometer>(23));

    Acceleration acc = pAcc->acceleration();

    std::shared_ptr<Accelerometer> pAcc2 = pAcc;


    return 0;
}