struct Blah{
	char c;
	int a;
};

int main()
{
	Blah b[100];

	std::cout << offsetof(Blah, c) << std::endl;
	std::cout << offsetof(Blah, a) << std::endl;
	std::cout << sizeof(Blah) << std::endl;
	std::cout << &b[0] << std::endl;
	std::cout << &b[1] << std::endl;
}

---------

Output:

0
4
8
00EFFAB0
00EFFAB8