#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
	int a[] = {10, 20, 30};
	const size_t n = sizeof a / sizeof a[0];

	for (size_t i = 0; i < n; ++i) {
		cout << "a[" << i << "]: address is " << a + i
			<< ", value is " << a[i] << ".\n";
	}

	cout << "\n";

	for (int *p = a; p < a + n; ++p) {
		cout << "a[" << p - a << "]: address is " << p
			<< ", value is " << *p << ".\n";
	}

	return EXIT_SUCCESS;
}