Delete pointer to multidimensional array in class through another pointer - how?

Question

I have a pointer to a class, that have a pointer to a multidimensional array but I can\'t seem to delete it from memory when I need to or set it to NULL.

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Answer 1

If you want a 2D array of pointers to , create a class to handle that, then put an instance of it in your TestClass. As far as how to do that, I'd generally use something on this order:

template 
class matrix2d {
    std::vector data;
    size_t cols;
    size_t rows;
public:
    matrix2d(size_t y, size_t x) : cols(x), rows(y), data(x*y) {}
    T &operator()(size_t y, size_t x) { 
        assert(x<=cols);
        assert(y<=rows);
        return data[y*cols+x];
    }
    T operator()(size_t y, size_t x) const { 
        assert(x<=cols);
        assert(y<=rows);
        return data[y*cols+x];
    }
};

class TestClass { 
    matrix2d array(10, 10);
public:
    // ...
};

Given that you're storing pointers, however, you might want to consider using Boost ptr_vector instead of std::vector.