#include <iostream>
using namespace std;

// global constant variable for unchanging values
const double CM_PER_INCH = 2.54;

int main()
{
	// declare variables first, can initialize
	double inches = 0;
	double cm = 0;

	// get number of inches from user
	cout << "How many inches? ";
	cin >> inches;

	// calculate number of centimeters
	cm = inches * CM_PER_INCH;

	// display number of centimeters
	cout << "Centimeters: " << cm << endl;

	// return from function with specified type of data (int)
	return 0;
}