Thread: Inheritance with pointers:Overloading?

i derived a class from a linklist class. the problem is i can't access the next or previous pointers.type mismatch.do anybody have an idea how to solve it? should i overload the base class pointers, and how should i go about it?
the program follows.i tried to make it as small as possible so please bear with me!!

Code:

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <stdio.h>
#include <iostream.h>
#include <dos.h>

//class definition of link list
class LLClass
  {
   protected:
     class LLClass *next;			//pointer to next position
     class LLClass *prev;			//pointer to previous position



   public:
     LLClass();
     ~LLClass();
     void setnext(class LLClass *temp);
     void setprev(class LLClass *temp);

     virtual class LLClass *getnext();
     virtual class LLClass *getprev();

  };
  LLClass::LLClass()
  {};

  LLClass::~LLClass()
  {}

void LLClass::setnext(class LLClass *temp)
  {
   next=temp;
  }//setnext

  void LLClass::setprev(class LLClass *temp)
  {
   prev=temp;
  }//setprev

  class LLClass *LLClass::getnext()
  {
   return next;
  }//getnext

  class LLClass *LLClass::getprev()
  {
   return prev;
  }//getprev

//class definition for class point
class Point
  {
   private:
     int x,y;   			//top left corner
     int color;				//color of the box
     int direction;			//direction the rectangle is going


   public:
     Point();
     ~Point();

     int xx,yy;				//public coordinates
     int chcolor;			//change in the color
     int dir;                           //the direction of the box

     void setvalues(int xx, int yy);       //get values for x,y
     void setcolor(int chcolor);	   //change the color
     void setdir(int dir);                 //change the direction

     int getx();
     int gety();
     int getcolor();
     int getdir();

     int inccolor();
     int deccolor();
     int incx();
     int decx();
     int incy();
     int decy();
  };
  Point::Point()
 {
  x=y=0;				//default box at 0
  direction=0;				//default direction at 0
  color=2;				//default color green
 }//cnstrctr
 Point::~Point()
  {}

 void Point::setvalues(int xx, int yy)
 {
   x=xx;
   y=yy;
 }//setvalues

 void Point::setcolor(int chcolor)
{
 color=chcolor;
}//setcolor

void Point::setdir(int dir)
{
 direction=dir;
}//setdir

int Point::getx()
{
 return x;
}//getx

int Point::gety()
{
 return y;
}//gety

int Point::getcolor()
{
 return color;
}//getcolor

int Point::getdir()
{
 return direction;
}//getdir

int Point::inccolor()
{
 color++;
 return color;
}//inccolor

int Point::deccolor()
{
 color--;
 return color;
}//deccolor

int Point::incy()
{
 y++;
 return y;
}//incy

int Point::decy()
{
 y--;
 return y;
}//decy

int Point::incx()
{
 x++;
 return x;
}//incx

int Point::decx()
{
 x--;
 return x;
}//decx

//class definition of rectangle
class Rectangle:public LLClass,public Point
  {
   private:
     int b,t;


   public:
     Rectangle();				//constructor
     ~Rectangle();				//destructor
     class Rectangle *newptr,*first,*last,*curr;//pointers

     //functions in class
     void setrnext(class LLClass *temp);
     class LLClass *convnext(class LLClass *temp);
     class Rectangle *getrnext();                        //next pointer


     class LLClass *getnext();                        //next pointer
     class LLClass *getprev();                        //prev pointer
  };
  Rectangle::Rectangle()
  {}//cnstrctr

  Rectangle::~Rectangle()
  {}

  class LLClass *Rectangle::getnext()
  {
   return next;
  }//getnext

  class LLClass *Rectangle::getprev()
  {
   return prev;
  }//getprev

int main(int argc,char *argv[])
{
   class Rectangle *first,*last,*curr, *newptr, *temp;
   class LLClass *temp;
   int rct,choice;


   //auto detection
   int gdriver = 0, gmode, errorcode;

   //initialize graphics
   initgraph(&gdriver, &gmode, "c:\\tc\\bgi\\");


   //result of initialization
   errorcode = graphresult();

   if (errorcode != grOk)
   {
      printf("Graphics error: %s\n", grapherrormsg(errorcode));
      printf("Press any key to halt:");
      getch();
      exit(1);
   }
   //get the number of objects
   rct=atoi(argv[1]);


   //create first box
   randomize();
   first=curr=newptr=new Rectangle;
   first->setvalues(20+rand()%600,20+rand()%430);



   for(int b=1;b<=rct-1;b++)
   {
    newptr=new Rectangle;
    newptr->setvalues(20+rand()%600,20+rand()%430);


    //linking
    newptr->setprev(curr);
    curr->setnext(newptr);
    curr=newptr;
   }//end of new box (fr)
   newptr->setnext(first);
   last=newptr;
   first->setprev(newptr);

   //draw outerbox
   choice=0;
   rectangle(1,1,630,470);


   //problem starts here
   //the linklist was created and data was written to it but i can't access it
   //draw the small boxes
   curr=first;
   setcolor(15);
   cout<<endl;
   for (int j=1;j<=rct;j++)
   {
    temp=curr->getnext();
    curr=curr->getnext();
    cout<<newptr->getprev()<<"   ";
    cout<<newptr->getnext()<<endl;
   }//fr

 getch();
 closegraph();
 argc=argc;
 choice=choice;
 last=last;
 return 0;
}

if some one can help via e-mail or thread please do.thx

what methods?
i don't know what methods there are!
i could post a smaller program:#include <stdio.h>
#include <conio.h>
#include <stdio.h>
#include <iostream.h>
#include <dos.h>

//class definition of link list
class LLClass
{
protected:
class LLClass *next; //pointer to next position
class LLClass *prev; //pointer to previous position



public:
LLClass();
~LLClass();
void setnext(class LLClass *temp);
void setprev(class LLClass *temp);

class LLClass* getnext();
class LLClass* getprev();

};
LLClass::LLClass()
{};

LLClass::~LLClass()
{}

void LLClass::setnext(class LLClass *temp)
{
next=temp;
}//setnext

void LLClass::setprev(class LLClass *temp)
{
prev=temp;
}//setprev

class LLClass *LLClass::getnext()
{
return next;
}//getnext

class LLClass *LLClass::getprev()
{
return prev;
}//getprev

//class definition for class point
class Point
{
private:
int x,y; //top left corner
int color; //color of the box
int direction; //direction the rectangle is going


public:
Point();
~Point();

int xx,yy; //public coordinates
int chcolor; //change in the color
int dir; //the direction of the box

void setvalues(int xx, int yy); //get values for x,y
void setcolor(int chcolor); //change the color
void setdir(int dir); //change the direction

int getx();
int gety();
int getcolor();
int getdir();

int inccolor();
int deccolor();
int incx();
int decx();
int incy();
int decy();
};

//no problem with this implementation
//class definition of rectangle
class Rectangleublic LLClass,public Point
{
private:
int b,t;



public:
Rectangle(); //constructor
~Rectangle(); //destructor

//functions in class


};
Rectangle::Rectangle()
{}//cnstrctr

Rectangle::~Rectangle()
{}



int main(int argc,char *argv[])
{
class Rectangle *first,*last,*curr, *newptr, *temp;
int rct,choice;



//create first box
randomize();
first=curr=newptr=new Rectangle;
first->setvalues(20+rand()%600,20+rand()%430);



for(int b=1;b<=rct-1;b++)
{
newptr=new Rectangle;
newptr->setvalues(20+rand()%600,20+rand()%430);


//linking
newptr->setprev(curr);
curr->setnext(newptr);
curr=newptr;
}//end of new box (fr)
newptr->setnext(first);
last=newptr;
first->setprev(newptr);


//draw outerbox
choice=0;
rectangle(1,1,630,470);


//problem starts here
//the linklist was created and data was written to it but i can't access it
//draw the small boxes
curr=first;
setcolor(15);
cout<<endl;
for (int j=1;j<=rct;j++)
{
cout<<curr->getx()<<" ";
cout<<curr->gety()<<endl;
//?????????????????????
curr=curr->getnext();
}//fr

getch();
return 0;
}