using std::copy;

using std::copy_backward;

using std::distance;

using std::fill;

using std::ostream;

using std::ptrdiff_t;

template

class Array

{

public:

using value_type = T;

// Iterators are just pointers to objects of type T

using iterator = value_type*;

using const_iterator = const value_type*;

using reference = value_type&;

using const_reference = const value_type&;

using size_type = size_t;

using difference_type = ptrdiff_t;

void

push_back (const T& item)

{

insert(end(),item);

}

// Reserve capacity for "space" elements.

// "space" must be greater than capacity.

// If not, leave the capacity unchanged.

// "size" must remain unchanged.

void

reserve (size_t space)

{

if (space > capacity ())

{

T* array = new T[space];

copy (begin (), end (), array);

delete[] m_array;

m_array = array;

m_capacity = space;

}

}

// TODO!

// Change the size to be "newSize".

// If "newSize" is less than "size",

// erase the last elements.

// If "newSize" is more than "size",

// insert "value"-s at the end.

void

resize (size_t newSize, const T& value = T ())

{

}

// TODO!

// Insert "item" before "pos", and return iterator pointing to "item".

// If the capacity is insufficient, DOUBLE it.

// If the capacity is 0, increase it to 1.

// NOTE: If a reallocation occurs, "pos" will be invalidated!

iterator

insert (iterator pos, const T& item)

{

}

private:

// Stores the number of elements in the Array.

size_t m_size;

// Stores the capacity of the Array, which must be at least "m_size".

size_t m_capacity;

// Stores a pointer to the first element in the Array.

T* m_array;

};

Help with

void

resize (size_t newSize, const T& value = T ())

{

}

and

iterator

insert (iterator pos, const T& item)

{

}