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#include <iostream>
#include <fstream>
#include <iomanip>
using namespace std;
//=============================================================================
// Function prototypes
void openFile(ifstream &fp);
char Shipment();
double Discount(double);
double Tax(double, double);
double Total_Bill(double, double, double, double);
void Bill(double, double, double, double, double);
//=============================================================================
// Main function executes all other functions
int main()
{
ifstream fp;
string name;
openFile(fp);
char D;
double tax;
double discount;
double ship;
double TotalBill;
double num;
double total_sum = 0;
char val;
bool flag = false;
while (fp>>num)
{
// cout << "Enter the file you want to open: ";
//cin >> name;
// Loop controls repetition of program
//put forloop here
double value, sum;
for (int counter=1; counter <=num; counter++)
{
fp>>D;
fp>>value;
sum+=value;
}
return sum;
if(num > 0)
{
cout << "===================================================" <<endl;
//D=Shipment();
if (D == 'S')
ship = 4.99;
else if (D == 'E')
ship = 12.99;
discount = Discount(total_sum);
tax = Tax(total_sum, discount);
TotalBill = Total_Bill(total_sum, discount, tax, ship);
Bill(total_sum, tax, discount, ship, TotalBill);
}
else
{
cout << "\nExit from program." << endl;
}
total_sum = 0;
}
fp.close();
return 0;
}
//=============================================================================
// Gets order data from file - NEW ADDITION
void openFile(ifstream &fp)
{
string name;
cout << "Enter file name: ";
cin >> name;
fp.open(name.c_str());
}
//=============================================================================
// Asks for shipment method (Standard=S, Expedited=E)
char Shipment()
{
char D;
cout << "Enter S for standard or E for Expedited delivery: ";
cin >> D;
return D;
}
//=============================================================================
// Executes calculations for discounts
double Discount(double sum)
{
double discount;
if (sum < 50)
discount = 0;
else if (sum >= 50 && sum <=100)
discount = (sum * .1);
else if (sum > 100)
discount = (sum * .15);
return discount;
}
// Executes calculations for tax
double Tax(double sum, double discount)
{
double tax;
return tax = ((sum - discount) * .05);
}
// Executes calculation for grand total
double Total_Bill(double sum, double discount, double tax, double ship)
{
double Total;
return Total = ((sum - discount) + tax + ship);
}
//=============================================================================
// Displays subtotal, sales tax, discounts, shipping, and grand total
void Bill(double sum, double tax, double discount, double ship, double Total)
{
cout << setprecision(2) << fixed;
cout << left << endl;
cout << setw(19) << "Subtotal: " << "$" << sum << endl;
cout << setw(19) << "Sales Tax: " << "$" << tax << endl;
cout << setw(19) << "Discount: " << "$" << discount << endl;
cout << setw(19) << "Shipping: " << "$" << ship << endl;
cout << setw(19) << "Total: " << "$" << Total << endl << endl;
}
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