#include <iostream>
#include <cstdlib>   //for EXIT_SUCCESS, size_t
using namespace std;

int main()
{
	int i {10};

	int *p {&i};               //p holds the address of i.
			           //In other words, p "points to" i.

	cout << "The value of i is " << i << "\n";
	cout << "The address of i is " << &i << "\n";
	cout << "The address of i is " << p << "\n";

	//If you want to make sure that p does not hold the address of anything,
	p = nullptr;

	return EXIT_SUCCESS;
}