#include <iostream>
using namespace std;

const int DefaultSize = 3;

// A trivial class for adding to arrays
class Animal
{
  public:
     // constructors
    Animal(int);
    Animal();
    ~Animal();

    // accessors
    int GetWeight() const { return itsWeight; }
    void SetWeight(int theWeight) { itsWeight = theWeight; }

    // friend operators
    friend ostream& operator<< (ostream&, const Animal&);

  private:
    int itsWeight;
};

// extraction operator for printing animals
ostream& operator<<
(ostream& theStream, const Animal& theAnimal)
{
   theStream << theAnimal.GetWeight();
   return theStream;
}

Animal::Animal(int weight):
itsWeight(weight)
{
   cout << "animal(int) ";
}

Animal::Animal():
itsWeight(0)
{
   cout << "animal() ";
}

Animal::~Animal()
{
   cout << "Destroyed an animal...";
}

template <class T>   // declare the template and the parameter
class Array            // the class being parameterized
{
  public:
    Array(int itsSize = ::DefaultSize);
    Array(const Array &rhs);
    ~Array() { delete [] pType; }

    // operators
    Array& operator=(const Array&);
    T& operator[](int offSet) { return pType[offSet]; }
    const T& operator[](int offSet) const
    { return pType[offSet]; }

    // accessors
    int GetSize() const { return itsSize; }
    // friend function
    template <class T>
    friend ostream& operator<< (ostream&, const Array<T>&);

  private:
    T *pType;
    int  itsSize;
};

template <class T>
Array<T>::Array(int size = DefaultSize):
itsSize(size)
{
   pType = new T[size];
   for (int i = 0; i < size; i++)
      pType[i] = (T)0;
}

template <class T>
Array<T>& Array<T>::operator=(const Array &rhs)
{
   if (this == &rhs)
      return *this;
   delete [] pType;
   itsSize = rhs.GetSize();
   pType = new T[itsSize];
   for (int i = 0; i < itsSize; i++)
      pType[i] = rhs[i];
   return *this;
}

template <class T>
Array<T>::Array(const Array &rhs)
{
   itsSize = rhs.GetSize();
   pType = new T[itsSize];
   for (int i = 0; i < itsSize; i++)
      pType[i] = rhs[i];
}


template <class T>
ostream& operator<< (ostream& output, const Array<T>& theArray)
{
   for (int i = 0; i<theArray.GetSize(); i++)
      output << "[" << i << "] " << theArray[i] << endl;
   return output;
}


Array<Animal>::Array(int AnimalArraySize):
itsSize(AnimalArraySize)
{
   pType = new Animal[AnimalArraySize];
}


void IntFillFunction(Array<int>& theArray);
void AnimalFillFunction(Array<Animal>& theArray);

int main()
{
   Array<int> intArray;
   Array<Animal> animalArray;
   IntFillFunction(intArray);
   AnimalFillFunction(animalArray);
   cout << "intArray...\n" << intArray;
   cout << "\nanimalArray...\n" << animalArray << endl;
   return 0;
}

void IntFillFunction(Array<int>& theArray)
{
   bool Stop = false;
   int offset, value;
   while (Stop == false)
   {
      cout << "Enter an offset (0-2) and a value. ";
      cout << "(-1 to stop): " ;
      cin >> offset >> value;
      if (offset < 0)
         break;
      if (offset > 2)
      {
         cout << "***Please use values between 0 and 2.***\n";
         continue;
      }
      theArray[offset] = value;
   }
}


void AnimalFillFunction(Array<Animal>& theArray)
{
   Animal * pAnimal;
   for (int i = 0; i<theArray.GetSize(); i++)
   {
      pAnimal = new Animal(i*10);
      theArray[i] = *pAnimal;
      delete pAnimal;
   }
}