How to resolve "undefined reference" issues? about opencv3-intro-book-src HOT 4 OPEN

// 循环，按下ESC, Q, q键程序退出，否则有键按下便一直更新
while (1)
{
	// 参数初始化
	int count = rng.uniform(3, 103);    // 随机生成点的数量
	vector<Point> points;    // 点值

	// 随机生成点坐标
	for (int i = 0; i < count; i++)
	{
		Point point;
		point.x = rng.uniform(image.cols/4, image.cols*3/4);
		point.y = rng.uniform(image.rows/4, image.rows*3/4);

		points.push_back(point);
	}

	// 对给定的2D点集，寻找最小面积的包围矩形
	RotatedRect box = minAreaRect(Mat(points));
	Point2f vertex[4];
	box.points(vertex);

	// 绘制出随机颜色的点
	image = Scalar::all(0);
	for( int i = 0; i < count; i++ )
		circle( image, points[i], 3, Scalar(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255)), CV_FILLED, CV_AA );

	// 绘制出最小面积的包围矩形
	for( int i = 0; i < 4; i++ )
		line(image, vertex[i], vertex[(i+1)%4], Scalar(100, 200, 211), 2, CV_AA);

	// 显示窗口
	imshow( "矩形包围示例", image );

	// 按下ESC, Q, 或者q，程序退出
	char key = (char)waitKey();
	if (key == 27 || key == 'q' || key == 'Q')    // 'ESC'
		break;
}

return 0;