gistfile1.cpp

#include<stdio.h>

class A
{
	public:
	
	void trial();
	
	void log(int a)
	{
		printf("%d" , a);
	}
};


class B
{
	public:
	
	//void (*logger)(int);
	void (A::*logger)(int);
	
	//void set_handler(void (*functocall)(int))
	void set_handler(void (A::*functocall)(int))
	{
		logger = functocall;
	}
	
	void test()
	{
		(*((A*)this).*logger)(5);
	}
};

void A::trial()
{
	B bb;
	bb.set_handler(&A::log);
	bb.test();
}


int main()
{
	A aa;
	aa.trial();
}