Jason opened a coffee shop at the beach and sells coffee in three sizes: small (

Question

Jason opened a coffee shop at the beach and sells coffee in three sizes: small (9oz), medium (12oz), and large (15oz). The cost of one small cup is $1.75, one medium cup is $1.90, and one large cup is $2.00. Write a menu-driven program that will make the coffee shop operational.

Your program should allow the user to do the following: Buy coffee in any size and in any number of cups. At any time show the total number of cups of each size sold. At any time show the total amount of coffee sold. At any time show the total money made.

Your program should consist of at least the following functions: a function to show the user how to use the program, a function to sell coffee, a function to show the number of cups of each size sold, a function to show the total amount of coffee sold, and a function to show the total money made. Your program should not use any global variables and special values such as coffee cup sizes and cost of a coffee cup must be declared as named constants. You must use at least one void function and one value-returning function. You must use a mixture of value and reference parameters in your program.

Explanation / Answer

#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;

const double SMALL_CUP_COST = 1.75;
const double MEDIUM_CUP_COST = 1.90;
const double LARGE_CUP_COST = 2.00;

const int SMALL_CUP_SIZE = 9;
const int MEDIUM_CUP_SIZE = 12;
const int LARGE_CUP_SIZE = 15;

void menu();
void showCupCount(int s, int m, int l);
void showMoneyMade(double m);
void showCoffeeSold(int c);

void sellCoffee(int& sCupCount, int &mCupCount, int& lCupCount,
               int& totalCoffeeSold, double& tMoneyMade);

int main()
{
int smallCupCount = 0;
   int mediumCupCount = 0;
   int largeCupCount = 0;

   int totalAmountOfCoffeeSold = 0;

   double totalMoneyMade = 0.0;

   int choice;

   cout << fixed << showpoint << setprecision(2);

menu();
   cin >> choice;
   cout << endl;

   while (choice != 9)
   {
       switch (choice)
       {
       case 1:
           sellCoffee(smallCupCount, mediumCupCount, largeCupCount,
               totalAmountOfCoffeeSold, totalMoneyMade);
           break;
       case 2:
           showMoneyMade(totalMoneyMade);
           break;
       case 3:
           showCoffeeSold(totalAmountOfCoffeeSold);
           break;
       case 4:
           showCupCount(smallCupCount, mediumCupCount, largeCupCount);
           break;
       case 5:
           showCupCount(smallCupCount, mediumCupCount, largeCupCount);
           showCoffeeSold(totalAmountOfCoffeeSold);
           showMoneyMade(totalMoneyMade);
           break;
       default:
           cout << "Invalid choice." << endl;
       }

       menu();
cin >> choice;
cout << endl;
   }
  
   return 0;
}

void menu()
{
   cout <<"1: Enter 1 to order coffee." << endl;
   cout <<"2: Enter 2 to check the total money made up to this time." << endl;
   cout <<"3: Enter 3 to check the total amount of coffee sold up to this time." << endl;
   cout <<"4: Enter 4 to check the number of cups of coffee of each size sold." << endl;
   cout <<"5: Enter 5 to print the data." << endl;
   cout <<"9: Enter 9 to exit the program." << endl;
}

void showCupCount(int s, int m, int l)
{
   cout << "Small cup count: " << s << endl;
   cout << "Medium cup count: " << m << endl;
   cout << "Large cup count: " << l << endl;
}

void showMoneyMade(double m)
{
   cout << "Total money made: $" << m << endl;
}

void showCoffeeSold(int c)
{
   cout << "Total amount of coffee sold: " << c << "oz" << endl;
}

void coffeeMenu()
{
   cout <<"1: Enter 1 to buy coffee in a small cup size (9 oz)" << endl;
   cout <<"2: Enter 2 to buy coffee in a medium cup size (12 oz)" << endl;
   cout <<"3: Enter 3 to buy coffee in a large cup size (15 oz)" << endl;
   cout <<"9: Enter 9 to exit." << endl;
}

void sellCoffee(int& sCupCount, int &mCupCount, int& lCupCount,
               int& tCoffeeSold, double& tMoneyMade)
{
   int cupSize;
   int numOfCupsOrdered;

   double bill = 0;

   coffeeMenu();
   cin >> cupSize;
   cout << endl;

   while (cupSize != 9)
   {
       switch (cupSize)
   {
       case 1:
           cout << "Enter the number of cups: ";
           cin >> numOfCupsOrdered;
           cout << endl;

           sCupCount = sCupCount + numOfCupsOrdered;
           bill = bill + numOfCupsOrdered * SMALL_CUP_COST;
           tCoffeeSold = tCoffeeSold + numOfCupsOrdered * SMALL_CUP_SIZE;
           break;
       case 2:
           cout << "Enter the number of cups: ";
           cin >> numOfCupsOrdered;
           cout << endl;

           mCupCount = mCupCount + numOfCupsOrdered;
           bill = bill + numOfCupsOrdered * MEDIUM_CUP_COST;
           tCoffeeSold = tCoffeeSold + numOfCupsOrdered * MEDIUM_CUP_SIZE;
           break;
       case 3:
           cout << "Enter the number of cups: ";
           cin >> numOfCupsOrdered;
           cout << endl;

           lCupCount = lCupCount + numOfCupsOrdered;
           bill = bill + numOfCupsOrdered * LARGE_CUP_COST;
           tCoffeeSold = tCoffeeSold + numOfCupsOrdered * LARGE_CUP_SIZE;
           break;
       default:
           cout << "Invalid choice." << endl;
   }

   coffeeMenu();
   cin >> cupSize;
   cout << endl;
}

   cout << "Please pay $" << bill << endl;

   tMoneyMade = tMoneyMade + bill;
}

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