I have copied the following code and compiled and tried to run with MSVC 2010. The image appears and the next minute disappers. i am newbie in OpenCV. Could anybody tell me what is the problem with the following code:

include <cv.h>

include <highgui.h>

include <math.h>

using namespace cv; int main(int argc, char** argv) { Mat img, gray; if( argc != 2 && !(img=imread(argv[1], 1)).data) return -1;

cvtColor(img, gray, CV_BGR2GRAY);

// smooth it, otherwise a lot of false circles may be detected

GaussianBlur( gray, gray, Size(9, 9), 2, 2 );
vector<Vec3f> circles;

HoughCircles(gray, circles, CV_HOUGH_GRADIENT, 2, gray.rows/4, 200, 100 );
for( size_t i = 0; i < circles.size(); i++ )
{
     Point center(cvRound(circles[i][0]), cvRound(circles[i][1]));
     int radius = cvRound(circles[i][2]);
     // draw the circle center
     circle( img, center, 3, Scalar(0,255,0), -1, 8, 0 );
     // draw the circle outline
     circle( img, center, radius, Scalar(0,0,255), 3, 8, 0 );
}
namedWindow( "circles", 1 );
imshow( "circles", img );
return 0;

}

I have copied the following code and compiled and tried to run with MSVC 2010. The image appears and the next minute disappers. i am newbie in OpenCV. Could anybody tell me what is the problem with the following code:

#include <cv.h>
#include <highgui.h>
#include <math.h>

using namespace cv;
int main(int argc, char** argv)
{
    Mat img, gray;
    if( argc != 2 && !(img=imread(argv[1], 1)).data)
       return -1;
 
-1;

    cvtColor(img, gray, CV_BGR2GRAY);

 // smooth it, otherwise a lot of false circles may be detected

 GaussianBlur( gray, gray, Size(9, 9), 2, 2 );
 vector<Vec3f> circles;

 HoughCircles(gray, circles, CV_HOUGH_GRADIENT, 2, gray.rows/4, 200, 100 );
 for( size_t i = 0; i < circles.size(); i++ )
 {
      Point center(cvRound(circles[i][0]), cvRound(circles[i][1]));
      int radius = cvRound(circles[i][2]);
      // draw the circle center
      circle( img, center, 3, Scalar(0,255,0), -1, 8, 0 );
      // draw the circle outline
      circle( img, center, radius, Scalar(0,0,255), 3, 8, 0 );
 }
 namedWindow( "circles", 1 );
 imshow( "circles", img );
 return 0;
}
  
}