C / C++ / MFC

#include <iostream>

class A
{
public:
    	A()             	{ std::cout << "A constructor..." << std::endl; }
    	virtual ~A()    	{ std::cout << "~A destructor..." << std::endl; }

	A(const volatile A& a)	{ std::cout << "A const volatile& copy constructor..." << std::endl; }
	A(const A& a)		{ std::cout << "A const& copy constructor..." << std::endl; }
	//A(A&)			{ std::cout << "A & copy constructor..." << std::endl; }
	//A(volatile A& a)	{ std::cout << "A volatile& copy constructor..." << std::endl; }
};

class B
{
public:
    	B()             { std::cout << "B constructor..." << std::endl; }
    	virtual ~B()	{ std::cout << "~B destructor..." << std::endl; }

private:
	A a_;
};

class C
{
public:
    	C()             { std::cout << "C constructor..." << std::endl; }
    	virtual ~C()	{ std::cout << "~C destructor..." << std::endl; }

const volatile A&	getA()		{ return a_; }
private:
	A a_;
};

int main(int argc, char* argv[], char* envp[])
{
	//A	a1;
	//A	a2(a1);
	//const	A	a3;
	//A	a4(a3);
	//const volatile A a5;
	//A	a6(a5);
        //volatile A a7;
	//A	a8(a7);

	B	b1;
	B	b2(b1);

	C	c1;
	A	a = c1.getA();

	return 0;
}