Thread: Problem with function pointer

For example : in class A there is a public function pointer to the function B. How make function B can access to the private members or public members of class A; Code :

Code:

class A
void B1 ()
{
    Item_ = 10;
    TestMemberF();
    std::cout << "B Function Workd" << std::endl;
}

class A1
{
    private :
        void func1()
        {
            std::cout << "F1 works" << std::endl;
        }
        void func2()
        {
            std::cout << "F2 works" << std::endl;
        }
        int Item_ = 5;
        void (*ArgFunc)();
        void TestMemberF() { std::cout << "Test member func";}
    public :
        void DefineFunc(void (*Arg)())
        {
            ArgFunc = Arg;
        }
        void ExecutFunc()
        {
            ArgFunc();
        }


};

How to make function B can access to TestMember and Item_?