Data Structure

#include <list>
class Directory;
class Element
{
private:
    Directory* parent;
public:
    virtual bool IsDirectory();
    virtual bool IsFile();
    Directory* GetParent() {return parent;}
    void SetParent(Directory* setto) { parent = setto; }
};

class Directory : public Element
{
private:
    std::list<Element> children;
public:
    bool IsDirectory() { return true; }
    bool IsFile() { return false; }
    void AddChild(Element* child)
    {
        child->SetParent(this);
        children.push_back(child);
    }
};

template <class T> class File : public Element
{
private:
    T data;
public:
    bool IsDirectory() { return false; }
    bool IsFile() { return true; }
    T GetData() { return data; }
    void SetData(T setto) { data = setto; }
}