#include <cstdlib>
using namespace std;

class const_members {
	const int i;
	const int j;
public:
	const_members(int initial_i, int initial_j): i(initial_i), j(initial_j){
		//++i or ++j would not compile here
		f();
	}

	~const_members() {
		//--j or --i would not compile here
		f();
	}

	void f() {}   //a non-const member function
};

class obj {
	int i;
	int j;
public:
	obj(int initial_i, int initial_j): i(initial_i), j(initial_j) {
		++i; ++j; f();
	}

	~obj() {f(); --j; --i;}

	void f() {}   //a non-const member function
};

int main()
{
	const_members o1(30, 40);
	o1.f();                //will compile: o1 is not const object

	const obj o2(10, 20);
	//o2.f();              //won't compile: o2 is a const object

	return EXIT_SUCCESS;
}