C++ Dynamic Array Function Below I have the functions from the .h file and I nee

Question

C++ Dynamic Array Function

Below I have the functions from the .h file and I need help with the constructor!

template <class dynElem>

class dynarr {

private:

int capacity;

dynElem *A;

public:

dynarr() : capacity(0), A(NULL);

dynarr(int N): capacity(N), A(new dynElem[N]){}

dynarr(const dynarr<dynElem> &other);

~dynarr();

dynarr<dynElem> & operator=( const dynarr<dynElem> &other);

dynElem & operator[](int ndx) throw(InvalidIndex);

int getCapacity();

void reserve(int newcap);

// if newcap <= capacity, does nothing;

// if capacity is 0, allocates a dynamic array of

// capacity newcap and makes A point to that array;

// otherwise allocates a new dynamic array newA of capacity

// newcap, copies values in A to newA, deletes A and sets

// A equal to newA

};

Constructor function

template <class dynElem>

dynarr<dynElem>::dynarr(const dynarr<dynElem> &other)

{

}

Explanation / Answer

Hi, Please find my implementation.

Please let me know in case of any issue.

template <class dynElem>
dynarr<dynElem>::dynarr(const dynarr<dynElem> &other)
{
   // setting capacity of array from other array's capacity
   capacity = other.getCapacity();

   // creating array of size capacity
   A = new dynElem[capacity];

   // now copying other's elements to A, using overloaded operator [](as defined in .h file)
   for(int i=0; i<capacity; i++){
       A[i] = other[i];
   }
  
}

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