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#include <opencv2 highgui="" highgui.hpp=""> #include <opencv2 core="" core.hpp=""> #include <opencv2 core="" mat.hpp=""> #include <opencv2 imgproc="" imgproc.hpp="">

 #include <opencv2/highgui/highgui.hpp>
  #include <opencv2/core/core.hpp>
  #include <opencv2/core/mat.hpp>
  #include <opencv2/imgproc/imgproc.hpp>
  #include<iostream>
  #include<math.h>
 
#include<math.h>

using namespace std;
using namespace cv;
float sig(float x)
{
float s;
if(x==0) { s=0;}
else if(x>0) {s=1;}
else(x<0) {s=-1;}
return s;
}
void threshold(Mat src,float T)
{
    Mat dst;
 
dst;


for(int x=0;x<src.rows;x++) {="" for(int="" y="0;y&lt;src.cols;y++)" {="" float="" a="src.at&lt;float">(x,y);
float b=dst.at<float>(x,y);
 
x=0;x<src.rows;x++)
                {
                    for(int y=0;y<src.cols;y++)
                    {
float a=src.at<float>(x,y);
float b=dst.at<float>(x,y);

    if(a>T)
{
    {
        b=sig(a)*(fabs(a)-T);
}
    }
    else
{
    {
      b=0;
}
    }
    return b;
 
}
 
}

}
}
 int main()
{
system("clear");
 
system("clear");

 Mat src=imread("/home/jamal/Bureau/lena.jpg",0);
Mat dst;
float T=1;
threshold(src,T);   
 
 namedWindow("Picture", CV_WINDOW_AUTOSIZE); 
    imshow("Picture", src); 
       namedWindow("picf", CV_WINDOW_AUTOSIZE); 
    imshow("Picf", dst); 
    waitKey(); 

 return 0;
}
 
} 
I can't compile this code.what is the error I have committed?