// Mr. Minich
// CMPSC 201
// Ch. 2 Demo Program #2
// January 30, 2000 
// Purpose - to illustrate the dangers of not initializing variables when declaring them

#include <iostream>
using namespace std;

int main()
{
	const double PA_SALES_TAX = 0.06;     // the PA sales tax rate
  	double price = 0.0;                   // price of a purchase
 	int quantity = 0;                     // the quantity of items purchased
 	double totalCost;                     // the total cost of a purchase


	// Three variables and one constant are declared above.
	// price and quantity are initialized but totalCost is not.
    	// Therefore totalCost currently holds a garbage value. It is not automatically
	// initialized to the value of zero by C++ as you might assume.

	cout << "So far the total cost is " << totalCost << endl << endl;

	// At this point, totalCost will be displayed as a garbage value.

	price = 15.99;		// assigning price and quantity
	quantity = 2;

	// The statements above are called assignment statements

	cout << "The price is $" << price << endl;
	cout << "The quantity is " << quantity << endl;
	cout << "The PA sales tax rate is " << PA_SALES_TAX << endl << endl;

	cout << "Now the total cost is " << totalCost << endl;

	return 0;
}// end of main