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

int main()
{
	double d {3.14159};

	double v {d};         //v holds a copy of the value of d.
			      
	double *p {&d};       //p holds the address of d.
			      //In other words, p "points to" d.
			      
	size_t s {sizeof d};  //s holds the number of bytes in d.

	cout << "The value of d is " << v << "\n";
	cout << "The address of d is " << p << "\n";
	cout << "The number of bytes in d is " << s << "\n";

	return EXIT_SUCCESS;
}