CS162 Project 1: Full Program Source

main.cpp

// author: Nicholas Fazzolari
// project: Shopping budget tracker
// date: 1/6/2016

#include <iostream>
#include <iomanip>

using namespace std;

// this constant sets the _max_ number of array elements
// for the struct arrays in ShoppingCart 512 seems like a reasonable amount
const int N_OF_ELEMS = 512;

// shopping cart struct
struct ShoppingCart
{
	// use two arrays. one for name of item, other for price
	int lengthOfList = 0;
	double itemPrice[N_OF_ELEMS];
	char itemName[N_OF_ELEMS][32];
} newShoppingCart;

// add item to cart function (prototype)
void addItems(double total, double budget);

// print total function (prototype)
void printTotal(double total);

int main() {
	// numeric variables
	double budget = 0.0;
	double total = 0.0;
	double getNum = 0.0;

	// format the output stream for currency USD
	cout.setf(ios::fixed, ios::floatfield);
	cout.setf(ios::showpoint);
	cout.precision(2);

	// welcome message
	cout << "************************" << endl;
	cout << "Welcome to Tesk0 market " << endl;
	cout << "************************" << endl;
	cout << endl;

	// ask the user how big their shopping budget is
	cout << "What is your shopping budget today? $";
	cin >> budget;
	cin.ignore();
	cout << endl;

	// call functions that do the work
	addItems(total, budget);
	printTotal(total);

	return 0;
}

void addItems(double total, double budget) {
	double difference;
	cout << endl;
	cout << "****** ADD ITEMS AND PRICES BELOW ******" << endl;
	cout << endl;
	for (int row = 0; row < N_OF_ELEMS; row++) {
		// get the name of the item and store it in the itemName array
		cout << "Enter the name of item #" << newShoppingCart.lengthOfList << ": ";
		cin.getline(newShoppingCart.itemName[row], 32, '\n');

		// get the price of the item and store it in the itemPrice array
		cout << "Enter the price of item #" << newShoppingCart.lengthOfList << ": ";
		cin >> newShoppingCart.itemPrice[row];
		cin.ignore();
		cout << endl;

		// increment length of item list
		newShoppingCart.lengthOfList++;

		// update total
		total += newShoppingCart.itemPrice[row];
		cout << "Your running total is: " << total << endl;
		cout << endl;

		// calculate difference
		difference = budget - total;

		// check to terminate with two cases
		if (difference < 0) {
			cout << "You are $" << difference << " over budget. Please return some items." << endl;
			break;
		} else if (difference == 0) {
			cout << "Great budgeting skills you difference is: $" << difference << endl;
			break;
		}
	}
}

void printTotal(double total) {
	cout << endl;
	cout << "****** RECEIPT ******";
	cout << endl;
	// print items from array
	for (int row = 0; row < newShoppingCart.lengthOfList; row++) {
		cout << newShoppingCart.itemName[row] << setw(12) << right << "$" << newShoppingCart.itemPrice[row] << endl;
		total += newShoppingCart.itemPrice[row];
	}

	cout << endl;
	cout << "Your total shopping bill is: $" << total << endl;
	cout << endl;
}