c/c++:c++ function pointer

C + + function pointers:

Let me first write a class object that specifies that the function pointer must be a member of the object, or a member of its subclass.

Class object{public    :        void (object::* p) ();};

OK, then we'll write a class Hello inherits from Class object. Write a constructor that points to the output object type using a function pointer.

#include <iostream>class object{public:    void (object::* p) ();}; Class Hello:public Object{public:    hello () {        p = (void (object::*) ())) (&hello::say_hello);        The type that is cast to object. (        this->*p) ();//points to the position of P, and cuts calls to it.    }    void Say_hello () {        std::cout << "Hello world!" << Std::endl;    }; int main () {    Hello *p = new Hello ();    Delete p;    return 0;}

c/c++:c++ function pointer