图像显示程序

程序1： 
 #include <opencv2\opencv.hpp>
 #include <iostream>
 #include <string>
 using namespace cv;
 using namespace std;
 int main()
 {
  Mat img = imread("Tulips.jpg");
   if(img.empty())
 {
         cout<<"error";
         return -1;
    }
     imshow("xx的靓照",img);
     waitKey();
 
     return 0;
 }
 程序2：
  #include <opencv2\opencv.hpp>
 #include <iostream>
 #include <string>
 using namespace cv;
 using namespace std;
int main (int argc,char* argv[])
{ 
Mat img = imread("lena.jpg",0);
   if(img.empty())
   {