#include <vector>

struct A
{
	int a, b;
};

struct B
{
	int c, d;
};

using namespace std;

int main()
{
	vector<A> v1;
	vector<B> v2;

	for(vector<A>::iterator it = v1.begin(), end = v1.end(); it != end; ++it)
	{
		it->a = 0;
		it->b = 0;
		it->c = 0;
		it->d = 0;
	}

	for(vector<B>::iterator it = v2.begin(), end = v2.end(); it != end; ++it)
	{
		it->a = 0;
		it->b = 0;
		it->c = 0;
		it->d = 0;
	}

	return 0;
}