class Grid
{
 public:
  Grid(int inWidth = kDefaultWidth, int inHeight = kDefaultHeight);
  Grid(const Grid& src);
  ~Grid();
  Grid& operator=(const Grid& rhs);

  void setElementAt(int x, int y, const T& inElem);
  T& getElementAt(int x, int y);
  const T& getElementAt(int x, int y) const;
  int getHeight() const { return mHeight; }
  int getWidth() const { return mWidth; }
  static const int kDefaultWidth = 10;
  static const int kDefaultHeight = 10;

 protected:
  void copyFrom(const Grid& src);
  T** mCells;
  int mWidth, mHeight;
};