Question

The WideArray class implements a special array type for which each element consists of two 64-bit (long) quantities. That is, the first element of a WideArray is the first two elements of the underlying long array, the second element of the WideArrayconsists of the third and fourth words of the underlying array, etc.

class WideArray { public: WideArray(int n) { m_data = new long[2*n] ; m_size = n ; } // Other class methods class waIterator { public: waIterator(long *ptr = nullptr) { m_ptr = ptr; } bool operator!=(const waIterator &rhs) { return m_ptr != rhs.m_ptr ; } void operator++(int dummy); pair<long, long> operator*() { return pair<long,long>(*m_ptr, *(m_ptr+1)) ; } private: long *m_ptr; }; waIterator waBegin() { return waIterator(m_data) ; } waIterator waEnd(); private: int m_size; long *m_data; };

1. Why are waBegin and waEnd defined as members of the WideArray class rather than of the waIterator class?
2. Write the implementation of operator++.
3. Write the implementation of waEnd.

Answer 1