Base* Factory::create(int type) {
switch type {
case  1 : return new Class1;
case  2 : return new Class2;
case  3 : return new Class3;
}
}

Factory::factories[ 1 ] = new Class1::Factory;
Factory::factories[ 2 ] = new Class2::Factory;
Factory::factories[ 3 ] = new Class3::Factory;

class Factory {
static vector<(*f)(int)> inits;
static create(int type) {
for(int i= 0 ; i<inits.size(); inits[i++]->init(type));
}
}

class Class1 {
static void init(int);
}

class Class2 {
static void init(int);
}

#include <iostream>
#include <vector>

using namespace std;

class Factory {
public:
	static vector<void (*)(int)> inits;
	static void create(int type) {
		for(unsigned i =  0 ; i < inits.size(); (*inits[i++])(type));
	}
};

vector<void (*)(int)> Factory::inits;

class Class1 {
public:
	static void init(int type) {
		if (type ==  1 )
			cout<<"Class1 init"<<endl;
	};
	class Int1;
	friend class Int1;
	class Int1 {
	public:
		Int1() {
			cout<<"Int1"<<endl;
			Factory::inits.push_back(init);
			cout<<Factory::inits.size()<<endl;
		}
	};
	static Int1 int1;
};

Class1::Int1 Class1::int1;

class Class2 {
public:
	static void init(int type) {
		if (type ==  2 )
			cout<<"Class2 init"<<endl;
	};
	class Int2;
	friend class Int2;
	class Int2 {
	public:
		Int2() {
			cout<<"Int2"<<endl;
			Factory::inits.push_back(init);
			cout<<Factory::inits.size()<<endl;
		}
	};
	static Int2 int2;
};

Class2::Int2 Class2::int2;

int main(int argc, char *argv[])
{
	Factory::create( 1 );
	Factory::create( 2 );
	char c;
	cin>>c;
	return  0 ;
}

A *a=NULL;

A b;