#ifdef USE_DOT_H
    #include <iostream.h>
#else
    #include <iostream>
    #if !defined( __BORLANDC__ ) || __BORLANDC__ >= 0x0530
        using namespace std;      // Borland 5.0 has a bug
    #endif
#endif

#ifndef SAFE_STL
    #include <vector>
    using namespace std;
#else
    #include "vector.h"
    #include "StartConv.h"
#endif

template <class Object>
class Iterator;

template <class Object>
class VectorIterator;

// Same as the vector, but has a getIterator method.
// No extra data, no overridden methods, so non-virtual
// destructor in original vector is OK!
template <class Object>
class MyVector : public vector<Object>
{
  public:
    explicit MyVector( int size = 0 )
      : vector<Object>( size ) { }

    Iterator<Object> *getIterator( ) const
      { return new VectorIterator<Object>( this ); }
};


// A passive iterator class protocol. Steps through its container.
template <class Object>
class Iterator
{
  public:
    virtual ~Iterator( ) { }

    virtual bool hasNext( ) const = 0;
    virtual const Object & next( ) = 0;
};

// A concrete implementation of the iterator.
// Could have been nested inside of MyVector!
template <class Object>
class VectorIterator : public Iterator<Object>
{
  public:
    VectorIterator( const MyVector<Object> *v )
      : owner( v ), count( 0 ) { }

    bool hasNext( ) const
      { return count != owner->size( ); }

    const Object & next( )
      { return (*owner)[ count++ ]; }

  private:
    const MyVector<Object> *owner;
    int count;
};


int main( )
{
    MyVector<int> v;

    v.push_back( 3 );
    v.push_back( 2 );

    cout << "Vector contents: " << endl;

    Iterator<int> *itr = v.getIterator( );
    while( itr->hasNext( ) )
        cout << itr->next( ) << endl;

    delete itr;

    return 0;
}

#ifdef SAFE_STL
    #include "EndConv.h"
#endif