I have a class that simulates 2D matrix through the use of nested vectors as follows:
In the class header file this is what I have:
template <typename T> class L1Matrix {
private:
std::vector<std::vector<T> > mat;
unsigned rows;
unsigned cols;
public:
L1Matrix(); /* emptry constructor */
L1Matrix(unsigned _rows, unsigned _cols, const T& _initial);
L1Matrix(const L1Matrix<T>& rhs);
virtual ~L1Matrix();
T& operator()(const unsigned& row, const unsigned& col);
const T& operator()(const unsigned& row, const unsigned& col) const;
}
In the class declaration this is what I have:
// default constructor
template<typename T>
L1Matrix<T>::L1Matrix() : rows(0), cols(0) {};
template<typename T>
L1Matrix<T>::L1Matrix(unsigned _rows, unsigned _cols, const T& _initial) {
mat.resize(_rows);
for (unsigned i=0; i<mat.size(); i++) {
mat[i].resize(_cols, _initial);
}
rows = _rows;
cols = _cols;
}
template<typename T>
L1Matrix<T>::L1Matrix(const L1Matrix<T>& rhs) {
mat = rhs.mat;
rows = rhs.get_rows();
cols = rhs.get_cols();
}
template<typename T>
std::vector<std::vector<T> >::reference L1Matrix<T>::operator()(const unsigned& row, const unsigned& col) {
return this->mat[row][col];
}
For sake of brevity I am not giving the rest of the class implementation here.
Now in the main code I am creating pointer to this 2D matrix as follows:
L1Matrix<bool>* arr1; // this is pointer to L1Matrix object
L1Matrix<int> arr2(XSize, YSize, 0); // L1Mtarix object
arr1 = new L1Matrix<bool>(XSize, YSize, true);
Now for the actual L1Matrix object arr2 I can access the individual rows and columns like this: arr2(row,col) but my question is how to access the similar row and column elements using the L1Matrix pointer object arr1?
Please let me know. Thanks
