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#include <iostream>
#include <cmath>
#include <string.h>
#include <math.h>
using namespace std;
double itemValue(double item1, int quantity, double total);
double salesTax(double tax , double totalTax , double total , double item1, int quantity);
double couponCode(int codeNumber, double appliedCoupon, double totalTax, double tax, double total, double item1, int quantity);
int main()
{
double item1 = 0;
int quantity = 0;
double total = 0;
double tax = 0;
double totalTax = 0;
int codeNumber = 0;
double appliedCoupon = 0;
cout << "Thanks for shopping with us today, how many boxes of cereal were you looking to get? " << endl;
cin >> quantity;
cout << endl;
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);
cout << "The price before tax is $ " << itemValue(item1, quantity, total) << " ." << endl;
cout << endl;
cout << "We are applying the standard 5 percent tax to your purchase." << endl;
cout << endl;
cout << "\n The total price after tax is $ " << salesTax(tax, totalTax, total, item1, quantity) << endl;
cout << endl;
cout << "\n With the applied coupon your total is $ " << couponCode(codeNumber, appliedCoupon, totalTax, tax, total, item1, quantity) << endl;
system("pause");
return 0;
}
double itemValue(double item1, int quantity, double total)
{
item1 = 4.25;
total = quantity * item1;
return total;
}
double salesTax(double tax, double totalTax, double total, double item1, int quantity)
{
tax = 0.05;
totalTax = (itemValue(item1, quantity, total) * tax) + (itemValue(item1, quantity, total));
return totalTax;
}
double couponCode(int codeNumber, double appliedCoupon, double totalTax, double tax, double total, double item1, int quantity)
{
int couponOne = 2;
double couponFive = 5.00;
double couponTotal;
cout << "Please enter a coupon code that is either 1, or 5." << endl;
cin >> codeNumber;
if (codeNumber == 1)
{
couponTotal = salesTax(tax, totalTax, total, item1, quantity) / couponOne;
}
else if (codeNumber == 5)
couponTotal = salesTax(tax, totalTax, total, item1, quantity)  couponFive;
return couponTotal;
cout << "\n With the applied coupon your total is $ " << couponTotal << endl;
}
 