// Ch. 10 Demo #7
// Wyo C++
// October 24, 2001
// Purpose - uses a couple of struct variables and a function	

#include <iostream.h> 

struct Basket
{
	int apples;
	int grapes;
	int candyBars;
	double totalPrice;
	char coupon;
};

struct Prices
{
	double applePrice;
	double grapePrice;
	double candyBarPrice;
};

double computeTax(Basket myBasket);

int main()
{
	Basket customer1;
	Prices november;
	double savings = 0.0;

	november.applePrice = 0.60;
	november.grapePrice = 1.50;
	november.candyBarPrice = 0.85;

	cout << "What letter is on your coupon ('X' if no coupon): ";
	cin >> customer1.coupon;
	cout << "Enter number of apples: ";
	cin >> customer1.apples;
	cout << "Enter number of lbs of grapes: ";
	cin >> customer1.grapes;
	cout << "Enter number of candy bars: ";
	cin >> customer1.candyBars;

	customer1.totalPrice = customer1.apples * november.applePrice +
							customer1.grapes * november.grapePrice +
							customer1.candyBars * november.candyBarPrice;
	switch(customer1.coupon)
	{
	case 'A':
		savings = 1.00;
		break;
	case 'B':
		savings = 2.00;
		break;
	case 'C':
		savings = 3.00;
		break;
	default:
		savings = 0.00;
		break;
	}

	cout << "Your total cost is " << customer1.totalPrice - savings + computeTax(customer1) << endl;
	return 0;
}

double computeTax(Basket myBasket)
{
	return 0.06 * myBasket.candyBars;
}