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

void factorial();

int main()
{
	double f = 123.45;
	factorial();
	cout << "The f in main is " << f << ".\n";
	return EXIT_SUCCESS;
}

void factorial()
{
	int f = 1;

	for (int i = 1; i <= 4; ++i) {
		f *= i;	//or f = f * i;
	}

	//The i has already been destroyed by the time we arrive here.

	cout << "The factorial of 4 is " << f << ".\n";
}	//The f in factorial gets destroyed when we arrive here.