a.cpp

#include <iostream>
#include <functional>

#include <algorithm>
//#include <array>
//#include <vector>

class Nyan {
public:
	std::function<void()> fs[2];
	void hoge();
	void fuga();
	void caller();
	Nyan();
private:
	unsigned stat;
};

Nyan::Nyan() :stat(0) {
	auto behaviors = {&Nyan::hoge, &Nyan::fuga};
	std::transform(std::begin(behaviors),
			std::end(behaviors),
			fs,
			[this](auto f){ return std::bind(f, this); }
	);
};
void Nyan::hoge() {
	std::cout << "hoge" << std::endl;
	stat = 1;
}

void Nyan::fuga() {
	std::cout << "fuga" << std::endl;
	stat = 0;
}
void Nyan::caller() {
	fs[stat]();
}

int main() {
	Nyan n;
	n.caller();
	n.caller();
	n.caller();
	n.caller();

	return 0;
}