Parallelloopbody in opencv

Mode one

CV::Mat img(cv::Size(16, 16), CV_8UC1, cv::Scalar(0));
CV: :parallel_for_(cv: : Range (0, img.cols * img.rows), [&] (const cv: : Range& range) f for (int s = range.start; s < range.end; ++s)
int j= s / img.cols;int i = s % img.cols;
*img.ptr<uchar>(j, i) = s;
std::cout << "j: "<j<"; i:"<i<< std::endl;));

  Mode two

class ParallelBody : public cv::ParallelLoopBody
{
    public:
    ParallelBody(CV::Mat& img, const uchar& x, const uchar& y) : 
    m_img(img), m_x(x), m_y(y)
    virtual void operator() (const cV:: Range& range) const CV_OVERRIDE
    for (int r = range.start; r < range.end; ++r)
    {
        int j = r / m_img.cols;
        int i = r % m img.cols;
        *m_img.ptr<cv: :Vec3b> (j, i) = cV::Vec3b(r, m_x, m y);
    }
    ParallelBody& operator=(const ParallelBody&)
    {
        return *this
    };

    private: 
    CV::Mat& m_img;
    uchar m_x;
    uchar m y;
}

int main()
{
    CV::Mat image(CV:: Size(16,16), CV_8UC3, CV:: Scalar::all(0));
    ParallelBody ParallelBody (image, 2,1);
    CV:: parallel_for_(CV:: Range (0, image.))cols * image.rows), parallelBody);
}