How to use custom array in c++

template<typename T>
class array
{
public:
    typedef T* iterator;
    typedef const T* const_iterator;
private:
    iterator head;
    unsigned long elems;
public:
    array()
        : head(nullptr)
        , elems(0) {}
    array(const unsigned long &size)
        : head(size > 0 ? new T[size] : nullptr)
        , elems(size) {}
    array(const T[]);
    array(const array&);
    ~array() { delete[] head; }

    iterator begin() const { return head; }
    iterator end() const { return head != nullptr ? &head[elems] : nullptr; }
    unsigned long size() const { return elems; }

    array& operator=(const array&);
    T& operator()(const unsigned long&);
};

template<typename T>
array<T>::array(const T rhs[])
{
    unsigned long size = sizeof(rhs) / sizeof(T);
    head = new T[size];
    iterator pointer = begin();
    for (const_iterator i = &rhs[0]; i != &rhs[0] + size; i++)
        *pointer++ = *i;
}

template<typename T>
array<T>::array(const array<T> &rhs)
{
    head = new T[rhs.size()];
    iterator pointer = begin();
    for (const_iterator i = rhs.begin(); i != rhs.end(); i++)
        *pointer++ = *i;
}

template<typename T>
array<T>& array<T>::operator=(const array<T> &rhs)
{
    if (this != &rhs)
    {
        delete[] head;
        head = new T[rhs.size()];
        iterator pointer = begin();
        for (const_iterator i = rhs.begin(); i != rhs.end(); i++)
            *pointer++ = *i;
    }
    return *this;
}

template<typename T>
T& array<T>::operator()(const unsigned long &index)
{
    if (index < 1 || index > size())
    {
        // Add some error-handling here.
    }
    return head[index - 1];
}

Source: stackoverflow.com

Similar codes

0 vote251 views1 answer
Thread c++ member function
C++
0 vote210 views1 answer
Pop off end of string c++
C++
0 vote179 views1 answer
Reading package lists... Done Building dependency tree Reading state information... Done mysql-server is already the newest version (5.7.36-0ubuntu0.18.04.1). 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
C++
0 vote200 views1 answer
Tutti i tipi di equazioni trigonometriche
C++
1 vote202 views1 answer
How to loop a 2 dimensional vector in c++ starting from second element
C++
1 vote173 views1 answer
Controlling in windows
C++
0 vote178 views4 answers
C++ to c converter
C++
1 vote232 views1 answer
Create n threads cpp
C++
0 vote199 views1 answer
Check .h files syntax c++
C++
0 vote204 views1 answer
Str[i] - '0'
C++