Way to sort in C++, how? 4 cases

From:

Andreas Ott <aok@dis.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 21 May 2009 21:10:28 +0200

Message-ID:

<eRx0Qfk2JHA.3544@TK2MSFTNGP04.phx.gbl>

http://www1.minpic.de/bild_anzeigen.php?id=72043&key=73473177&ende

Hello together,

I have a big problem.
I have 4 cases about the way.
Please see the picture.

Problem:
My code is not working. I don't know why.
Can somebody help me.

C++ Application

Why not work with new?
http://www1.minpic.de/bild_anzeigen.php?id=72120&key=75625063&ende

Must I cast something?
http://www1.minpic.de/bild_anzeigen.php?id=72121&key=83688059&ende

Debug output
http://www1.minpic.de/bild_anzeigen.php?id=72122&key=94859995&ende

With best regards Andreas
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Sort_Wege.cpp : Definiert den Einstiegspunkt f?r die Konsolenanwendung.
//

#include "stdafx.h"
#include "Sort_Wege.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// Das einzige Anwendungsobjekt

CWinApp theApp;

using namespace std;

#pragma once
#include <vector>
#include <algorithm>

typedef class CSortWay
{
public:
  CSortWay(){}
  ~CSortWay(){}
  typedef std::vector<CSortWay *> LstResult;
public:
  double m_x;
  double m_y;

  static double SqrtSort(const CSortWay *var1,const CSortWay *var2)
  {
     register double x1 = var1->m_x;
     register double y1 = var1->m_y;

     register double x2 = var2->m_x;
     register double y2 = var2->m_y;

     return( (x1*x1 + y1*y1) < (x2*x2 + y2*y2) );
  }
}CSORTWAY;

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
    int nRetCode = 0;

    // MFC initialisieren und drucken. Bei Fehlschlag Fehlermeldung aufrufen.
    if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
    {
        // TODO: Den Fehlercode an Ihre Anforderungen anpassen.
        _tprintf(_T("Schwerwiegender Fehler bei der MFC-Initialisierung\n"));
        nRetCode = 1;
    }
    else
    {

//1 10 10
//2 10 20
//3 10 30
//4 10 40
//5 20 40
//6 20 30
//7 20 20
//8 20 10
//9 30 10
//10 30 20
//11 30 30
//12 30 40
//13 40 40
//14 40 30
//15 40 20
//16 40 10
//17 50 10
//18 50 20
//19 50 30
//20 50 40
          CSortWay::LstResult mylistSortWay;

         CSortWay obj; //= new CSortWay();
         obj.m_x = 10;
         obj.m_y = 10;
         mylistSortWay.push_back(&obj);
          obj.m_x = 10;
         obj.m_y = 20;
         mylistSortWay.push_back(&obj);
         obj.m_x = 10;
         obj.m_y = 30;
         mylistSortWay.push_back(&obj);
         obj.m_x = 10;
         obj.m_y = 40;
         mylistSortWay.push_back(&obj);

         obj.m_x = 20;
         obj.m_y = 10;
         mylistSortWay.push_back(&obj);
          obj.m_x = 20;
         obj.m_y = 20;
         mylistSortWay.push_back(&obj);
         obj.m_x = 20;
         obj.m_y = 30;
         mylistSortWay.push_back(&obj);
         obj.m_x = 20;
         obj.m_y = 40;
         mylistSortWay.push_back(&obj);

         obj.m_x = 30;
         obj.m_y = 10;
         mylistSortWay.push_back(&obj);
          obj.m_x = 30;
         obj.m_y = 20;
         mylistSortWay.push_back(&obj);
         obj.m_x = 30;
         obj.m_y = 30;
         mylistSortWay.push_back(&obj);
         obj.m_x = 40;
         obj.m_y = 40;
         mylistSortWay.push_back(&obj);

         obj.m_x = 50;
         obj.m_y = 10;
         mylistSortWay.push_back(&obj);
          obj.m_x = 50;
         obj.m_y = 20;
         mylistSortWay.push_back(&obj);
         obj.m_x = 50;
         obj.m_y = 30;
         mylistSortWay.push_back(&obj);
         obj.m_x = 50;
         obj.m_y = 40;
         mylistSortWay.push_back(&obj);

         std::sort(mylistSortWay.begin(),
                   mylistSortWay.end(),
                   CSortWay::SqrtSort);

          for ( register CSortWay::LstResult::iterator
it2(mylistSortWay.begin());
               it2!=mylistSortWay.end();
               it2++ )
          {
             /* printf("Pos=%d x= %7.2f, y=%7.2f\r\n",
                        it2,
                        (*it2).m_x,
                        (*it2).m_y);*/
          }
    }

    return nRetCode;
}