// MT1Q4aMin - Smallest entirely correct Array class with policy

#include <string>
#include <iostream>

struct rowDisplayPolicy
{
  static std::string seperator() { return ", "; }
};

struct columnDisplayPolicy
{
  static std::string seperator() { return "\n  "; }
};

template <typename T, int Size, typename DisplayPolicy>
class Array {
public:
  int size() const { return Size; }

  Array() {}
  T& operator[](int n)
  {
    if(n<0 || Size<=n)
      throw std::exception("index out of range");
    return _array[n];
  }
  T operator[](int n) const
  {
    if(n<0 || Size<=n)
      throw std::exception("index out of range");
    return _array[n];
  }
  void display() const
  {
    std::cout << "\n  ";
    for(int i=0; i<Size-1; ++i)
      std::cout << _array[i] << DisplayPolicy::seperator();
    std::cout << _array[Size-1] << "\n";
  }
private:
  Array(const Array<T,Size,DisplayPolicy>&);
  Array<T,Size,DisplayPolicy>& operator=(const Array<T,Size,DisplayPolicy>&);
  T _array[Size];
};

int main()
{
  double temp1[] = { 0, 0.5, 1.0, 1.5, 2.0 };
  Array<double, 5, rowDisplayPolicy> arr1;
  for(int i=0; i<5; ++i)
    arr1[i] = temp1[i];
  arr1.display();

  int temp2[] = { 1, 2, 3, 4, 5 };
  Array<int, 5, columnDisplayPolicy> arr2;
  for(int i=0; i<5; ++i)
    arr2[i] = temp2[i];
  arr2.display();
}