The Variable class

class Variable
{
protected:
    variable v;
    
public:
    Variable(int, char*, Data_type, const Entity &);
    ~Variable();
    
    
    int get_id() const;
    char *get_name() const;
    int get_entity_id() const;
    char *get_entity_name() const;
    variable get_v() const;
};