title: opencv format string
body: <p>pls help i have this code and i want to add to this x and y position</p>
  
  <pre><code>cv::Rect r = some thing;
  std::cout &lt;&lt; cv::format("%d, %s (%dx%d)\n", i+1, outfile.c_str(), r.width, r.height);
  </code></pre>
  
  <p>how to add x and y like this
  iam try this but its didnt work </p>
  
  <pre><code>std::cout &lt;&lt; cv::format("%d, %s (%dx%d)\n", i+1, outfile.c_str(), r.width, r.height, r.x, r.y);
  </code></pre>
  
  <p>i try it its not work</p>
  
  <p>but when i add the r.x and r.y  and replace with r,height and r.width its work but i want the height and width and x and y</p>
  
  <pre><code>      std::cout &lt;&lt; cv::format("%d, %s (%dx%d)\n", i+1, outfile.c_str(), r.x, r.y);
  </code></pre>