开关openCV

 #include <cv.h>
 #include <highgui.h>
 #include <stdio.h>
 //开关
 
 int g_switch_value = ;
 
 void switch_callback(int position)
 {
     if(position == )
     {
         printf("off\n");
     }
     else
     {
         printf("on\n");
     }
 }
 
 int main()
 {
     cvNamedWindow("Demo Window",);
     cvCreateTrackbar(
         "Switch",
         "Demo Window",
         &g_switch_value,
         ,
         switch_callback
         );
     while ()
     {
         if(cvWaitKey() == ) break;
 
     }
 }