#include <iostream>
using namespace std;
class test{
	protected:
	    int field;
	    test* next;
	public:
		test(int field);
		test(){;
		};
		~test(){
		};
		static test* begin;
		static test* end;
		static void DelList();
		static void print();
		void add();
		virtual void show();

};

void test::add(){
  if (begin == NULL)
     { begin = this; end = this; this->next = NULL;}
   else { end->next = this; this->next = NULL; end = this;}
};

void test::print(){
	test* cur; //current
	cur = begin;
	while(cur != 0){
		std::cout << "check" << std::endl;
		cur->show();
		cur = cur->next;
	}
}
//================
class example : public test{
	protected:
		int year;
		public:
        example() : test(){year = 0;};
        ~example(){
		};
        void show();
};


static int boo;

int main(){
	test A;
	A.add();
	test::print();
	return 666;
}