example_02-02.cpp

#include "opencv2/highgui/highgui.hpp"

using namespace cv;

int main( int argc, char** argv ) {

  Mat img = imread( argv[1], -1 );

  if( img.empty() ) return -1;

  namedWindow( "Example 2-2", cv::WINDOW_AUTOSIZE );

  imshow( "Example 2-2", img );

  waitKey( 0 );

  destroyWindow( "Example 2-2" );
}