#include 
using namespace std;
class MapRect
{
   public:
     int a;
     int b;
};    bool a(MapRect &m1, MapRect &m2)
{
  return (m1.b > m2.b);
}    void __fastcall TForm1::Button1Click(TObject *Sender)
{
list temp;    temp.sort(a);
}