adding samples for brief and the cout << cv::Mat functions.

samples/cpp/cvout_sample.cpp

@@ -0,0 +1,34 @@
+#include "opencv2/core/core.hpp"
+
+using namespace std;
+using namespace cv;
+
+int main()
+{
+  Mat i = Mat::eye(4, 4, CV_32F);
+  cout << "i = " << i << ";" << endl;
+
+  Mat r = Mat(10, 10, CV_8UC1);
+  randu(r, Scalar(0), Scalar(255));
+
+  cout << "r = " << r << ";" << endl;
+
+  Point2f p(5, 1);
+  cout << "p = " << p << ";" << endl;
+
+  Point3f p3f(2, 6, 7);
+  cout << "p3f = " << p3f << ";" << endl;
+
+  vector<Point2f> points(20);
+  for (size_t i = 0; i < points.size(); ++i)
+  {
+    points[i] = Point2f(i * 5, i % 7);
+  }
+  cout << "points = " << points << ";" << endl;
+
+  cout << "#csv" << endl;
+
+  writeCSV(cout, r);
+
+  return 1;
+}