How Do I Call Display Through Iterate?

Hi how do I call display through Iterate in PartsCatalog? I know I overloaded it in CarPart and AirPlanePart but how do I call it in PartsCatatlog? I tried loads of combinations with *,& and USHORT but I didn't get anything that worked.

Thanks.


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  #include <iostream>

typedef unsigned long ULONG;
typedef unsigned short USHORT;
using namespace std;

//************Part******************

// Abstract base class of parts
class Part
{
public:
    Part():itsPartNumber(1) {}
    Part (ULONG PartNumber):itsPartNumber(PartNumber) {}
    virtual ~Part(){}
    ULONG GetPartNumber() const { return itsPartNumber; }
    static void Display();
private:
    ULONG itsPartNumber;
};

// implementation of pure virtual function so that
// derived classes can chain up

void Part::Display()
{
    cout << "\nPart Number: " << &Part::itsPartNumber << endl; 
}

//***************Car Part***************

class CarPart : public Part
{
public:
    CarPart():itsModelYear(94){}
    CarPart(USHORT year, ULONG partNumber);
    static void Display() { Part::Display(); cout << "Model Year: " << 
    &CarPart::itsModelYear << endl; }
private:
    USHORT itsModelYear;
};

CarPart::CarPart(USHORT year, ULONG partNumber):
itsModelYear(year),
Part(partNumber)
{}


// ************ AirPlane **************

class AirPlanePart:public Part
{
public:
    AirPlanePart():itsEngineNumber(1){};
    AirPlanePart(USHORT EngineNumber, ULONG PartNumber);
    static void Display() { Part::Display(); cout << "Engine No.:" << &AirPlanePart::itsEngineNumber << endl; }
private:
    USHORT itsEngineNumber;
};

AirPlanePart::AirPlanePart(USHORT EngineNumber, ULONG PartNumber):
    itsEngineNumber(EngineNumber),
    Part(PartNumber)
    {}

class PartsList;
//************Part Node*************

class PartNode
{
public:
    friend class PartList;
    PartNode (Part*);
    ~PartNode();
    void SetNext(PartNode * node) { itsNext = node; }
    PartNode * GetNext() const;
    Part * GetPart() const;
    Part *itsPart;
    PartNode * itsNext;
    ULONG GetPartNumber;
private:

};

//PartNode Implementation..

PartNode::PartNode(Part* pPart):
itsPart(pPart),
itsNext(0)
{}

PartNode::~PartNode()
{
    delete itsPart;
    itsPart= 0;
    delete itsNext;
    itsNext = 0;
}

// Returns NULL if no next PartNode
PartNode * PartNode::GetNext() const
{
    return itsNext;
}

Part * PartNode::GetPart() const
{
    if (itsPart)
        return itsPart;
        else
        return NULL; //error
}

//***********Part List*****************

class PartsList
{
public:
    PartsList();
    ~PartsList();
    // needs copy constructor and operator equals!
    void Iterate(void (Part::*f)()const) const;
    Part* Find(ULONG & position, ULONG partnumber) const;
    Part* GetFirst() const;
    void Insert(Part *);
    Part* operator[](ULONG) const;
    ULONG GetCount() const { return itsCount; }
    static PartsList& GetGlobalPartsList() { return GlobalPartsList;}
private:
    PartNode * pHead;
    ULONG itsCount;
    static PartsList GlobalPartsList;
};

PartsList PartsList::GlobalPartsList;

//Implementations for Lists

PartsList::PartsList():

pHead(0),
itsCount(0)
{}

PartsList::~PartsList()
{
    delete pHead;
}


Part* PartsList::GetFirst() const
{
    if (pHead)
        return pHead->itsPart;
    else
        return NULL; //error catch here
}

Part * PartsList::operator[](ULONG offset) const
{
PartNode* pNode = pHead;

if (!pHead)
    return NULL;
if (offset > itsCount)
        return NULL; //error
        
    for (ULONG i=0; i<offset; i++)
        pNode = pNode->itsNext;
        
        return pNode->itsPart;
}

Part * PartsList::Find(ULONG & position, ULONG PartNumber) const
{
    PartNode * pNode = 0;
    for (pNode = pHead, position = 0;
    pNode!=NULL;
    pNode = pNode->itsNext, position++)
    {
        if (pNode->itsPart->GetPartNumber() == PartNumber)
            break;
    }
    if (pNode == NULL)
        return NULL;
        else
            return pNode->itsPart;
    }
    
    void PartsList::Iterate(void (Part::*func)()const) const
    {
        if (!pHead)
            return;
            PartNode* pNode = pHead;
            do
            (pNode->itsPart->*func)();
            while (pNode = pNode->itsNext);
    }
    
void PartsList::Insert(Part* pPart)
{
    PartNode * pNode = new PartNode(pPart);
    PartNode * pCurrent = pHead;
    PartNode * pNext = 0;
    
    ULONG New = pPart->GetPartNumber();
    ULONG Next = 0;
    itsCount++;
    
    if (!pHead)
    {
    pHead = pNode;
    return;
    }
    
    //if this one is smaller than head
    //this one the new head
    if (pHead->itsPart->GetPartNumber() > New)
    {
        pNode->itsNext = pHead;
        pHead = pNode;
        return;
    }
    
    for (;;)
    {
        // if there is no next, append this new one
        if (!pCurrent->itsNext)
        {
            pCurrent->itsNext = pNode;
            return;
        }
        
        // if this goes after this one and before the next
        // then insert it here, otherwise get the next
        pNext = pCurrent->GetPartNumber;
        pNode->itsNext = pNext;
        if (Next > New)
        {
            pCurrent->itsNext = pNode;
            pNode->itsNext = pNext;
            return;
        }
        pCurrent = pNext;
    }
}

class PartsCatalog : private PartsList
{
public:
    void Insert(Part *);
    ULONG Exists(ulong PartNumber);
    Part * Get(int PartNumber);
    operator+(const PartsCatalog &);
    void ShowAll() { Iterate(Part::Display);}
private:
};

void PartsCatalog::Insert(Part * newPart)
{
    ULONG partNumber = newPart->GetPartNumber();
    ULONG offset;
    
    if (!Find(offset, partNumber))
        PartsList::Insert(newPart);
        else
            {
                cout << partNumber << " was the ";
                switch (offset)
                {
                    case 0: cout << "first" ; break;
                    case 1: cout << "second" ; break;
                    case 2: cout << "third" ; break;
                    default: cout << offset+1 << "th ";
                }
                cout << "entry. Rejected!\n";
            }
        }

ULONG PartsCatalog::Exists(ULONG PartNumber)
{
    ULONG offset;
    Find(offset, PartNumber);
    return offset;
}

Part * PartsCatalog::Get(int PartNumber)
{
    ULONG offset;
    return (Find(offset, PartNumber));
}

void startof()
{
    PartsCatalog pc;
    Part * pPart = 0;
    ULONG PartNumber;
    USHORT value;
    ULONG choice;
    
    while (1)
    {
        cout << "(0)Quit, (1)Car, (2)Plane: ";
        cin >> choice;
        
        if (!choice)
            break;
            
            cout << "New Part Number?: ";
            cin >> PartNumber;
            
            if (!choice == 1)
            {
                cout << "Model year? ";
                cin >> value;
                pPart = new CarPart(value,PartNumber);
            }
            else
            {
                cout << "Engine Number?: ";
                cin >> value;
                pPart = new AirPlanePart(value, PartNumber);
            }
            pc.Insert(pPart);
    }
    pc.ShowAll();
}

int main()
{
    startof();
}
I'm not sure what you're doing with your CarPart::Display() method. Why are you trying to make it static (i.e. a class method)? It's attempting to display a non-static data member (itsModelYear), so it can't be a static method.
OP: instead of wading through 300+ lines of your code can you strip the problem down into a smaller, self-contained program and post that?
According to the comments you want this:
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class Part
{
public:
    Part():itsPartNumber(1) {}
    Part (ULONG PartNumber):itsPartNumber(PartNumber) {}
    virtual ~Part(){}
    ULONG GetPartNumber() const { return itsPartNumber; }
    static virtual void Display() = 0; // this is a pure virtual function
private:
    ULONG itsPartNumber;
};
The implementation of the pure virtual functions looks like this:
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void Part::Display()
{
    cout << "\nPart Number: " << &Part::itsPartNumber << endl; 
}


This actually suprises me. Something like this works:
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class Part
{
public:
...
    static void Display();
private:
    ULONG itsPartNumber;
};

void Part::Display()
{
    cout << "\nPart Number: " << &Part::itsPartNumber << endl; // How could this be implicitely converted to bool? It contains no value?
}
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