#include <iostream>
#include <opencv2/opencv.hpp>
#include <opencv2/highgui.hpp>

using namespace std;
using namespace cv;


int main(int argc, const char * argv[]) {
    // insert code here...
    float vals[] = {0.866025,-0.500000,0.500000,0.866025};
    CvMat rotmat;
    cvInitMatHeader(&rotmat, 2, 2, CV_32FC1,vals);
    cout<<"rotmat->rows = "<<rotmat.rows<<endl;
    cout<<"rotmat->clos = "<<rotmat.cols<<endl;
    cout<<"rotmat->step = "<<rotmat.step<<endl;  //表示行資料長度（單位是位元組數）
    
    for(unsigned int i = 0;i<rotmat.rows;i++)
    {
        for(unsigned int j = 0;j<rotmat.cols;j++)
        {
            cout<<i<<","<<j<<"->"<<*(rotmat.data.fl + i*rotmat.rows + j)<<endl;  //普通提取
            cout<<i<<","<<j<<"->"<<*((float *)(rotmat.data.ptr + i * rotmat.step) + j)<<endl;  //取uchar進行強轉 偏移
        }
    }
    return 1;
}