Random Thoughts.....What Are You Thinking?

#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
	double currentRead = 0.0;
	double prevRead = 0.0;
	double gallonsUsed = 0.0;
	double totalCharge = 0.0;
	const double CHARGE = 7.0;
	const double BASE_CHARGE = 16.67;

	//enter inputs
	cout << "Please enter the current meter reading: ";
	cin >> currentRead;
	cout << "Please enter the previous meter reading: ";
	cin >> prevRead;

	//calculate gallonsUsed
	gallonsUsed = currentRead - prevRead;

	//if statement
	if (gallonsUsed > 1000)
	{
		double extraCharge = 0.0;

		//if more than 1000 gallons were used
		extraCharge = gallonsUsed / 1000;
		totalCharge = extraCharge * CHARGE + BASE_CHARGE;
		cout << "Number of Gallons of water used: " << gallonsUsed << endl;
		cout << "Total water charge: $" << fixed << setprecision(2) << totalCharge << endl;
	}
	else
	{
		cout << "Number of gallons of water used: " << gallonsUsed << endl;
		cout << "Total water charge: $" << fixed << setprecision(2) << BASE_CHARGE << endl;
	} //endif

	return 0;

} //end of main function