C++ Use derived class method to change base class data member

Question

I'm having a hard time trying to figure out how to access and change base class data member using derived class method. Following code is a sample of what I want to do.

class A
{
    protected:
        string name;
    public:
        A():name("Name 1"){}
        void DisplayA()
        {
            cout<<name<<endl;
        }
};
class B : public A
{
    public:
        void Change()
        {
            cout<<"Enter New Name: ";
            getline(cin,name);
        }
        void DisplayB()
        {
            cout<<name<<endl;
        }
};
main()
{
    A Obj1;
    B Obj2;
    Obj1.DisplayA();
    Obj2.Change();   // I want this method to change the name in Base class too.
    Obj2.DisplayB(); 
    Obj1.DisplayA(); // This method should now display the new name that we set in Change();
}

Answer 1

You must define name as static std::string because modifying non-static members of an object change them only for that object.