linear C array to 2D std::vector

gistfile1.cpp

    #include <iostream>
    #include <vector>
     
    template<typename T>
    struct myIterator : public std::iterator<std::input_iterator_tag, T*>
    {
    myIterator(T* data) :
    data(data)
    {}
    T* data;
     
    bool operator==(const myIterator& rhs){return rhs.data == data;}
    bool operator!=(const myIterator& rhs){return rhs.data != data;}
    T* operator*(){return data;}
    T* operator->(){return data;}
     
    myIterator& operator++(){data = &data[1]; return *this; }
    };
     
    int main() {
     
    int myData[] = {
    1, 2, 3,
    4, 5, 6,
    7, 8, 9
    };
     
    size_t w = 3, h = 3;
    std::vector<std::vector<int*>> data;
    data.reserve(w);
     
    for (size_t i = 0; i < w; ++i)
    {
    data.emplace_back(myIterator<int>(&myData[i * h]),
    myIterator<int>(&myData[(i + 1) * h]));
    }
     
    for (const auto& i : data)
    for (const auto& j : i)
    std::cout << *j << std::endl;
     
    std::cout << "or with index access: " << std::endl;
     
    for (size_t i = 0; i < w; ++i)
    for (size_t j = 0; j < h; ++j)
    std::cout << *data[i][j] << std::endl;
    }