Question

#include

using namespace std;

int main()

{

    //declare variables and named constant

    int cupsPurchased =0;

    int platesPurchased =0;

    double cupPrice =0.0;

    double platePrice =0.0;

    double totalCupCost= 0.0;

    double totalPlateCost= 0.0;

    double subtotal =0.0;

    double totalCost =0.0;

    const double TAX_RATE = .055;

    //Enter input items

    cout << "Cup price: ";

    cin >> cupPrice;

    cout << "Plate price: ";

    cin >> platePrice;

    cout << "Cups purchased";

    cin >> cupsPurchased;

    cout << "Plates purchased: ";

    cin >> platesPurchased;

    //calculate the total cup cost, total plate

    //cost, the subtotal, and the total cost

    totalCupCost = cupsPurchased * cupPrice;

    totalPlateCost = platesPurchased * platePrice;

    subtotal = totalCupCost + totalPlateCost;

    totalCost = subtotal * TAX_RATE + subtotal;

    //display total cost

    cout << "Total cost: $" <

    return 0;

}

1. Simple calculator

Modify above code to include all 5 different math operations below:

(Add, subtract, multiply, divide and modulus (+, -, *, /, %))

Answer 1

#include <iostream>

using namespace std;

int main()
{

double cupsPurchased =0;

double platesPurchased =0;

int cupPrice =0.0; // change the datatype of cupPrice from double to int as '%' operator will not support double datatype

double platePrice =0.0;

int totalCupCost= 0.0; // change the datatype of totalCupCost from double to int as '%' operator will not support double datatype

double totalPlateCost= 0.0;

double subtotal =0.0;

double totalCost =0.0;
  
double totaltax = 0.0; // variable to store the total tax value
  
double modulo = 0.0; // variable to store the modulo result

const double TAX_RATE = .055;
  

//Enter input items

cout << "Cup price: ";

cin >> cupPrice;

cout << "Plate price: ";

cin >> platePrice;

cout << "Cups purchased";

cin >> cupsPurchased;

cout << "Plates purchased: ";

cin >> platesPurchased;

//calculate the total cup cost, total plate

//cost, the subtotal, and the total cost

totalCupCost = cupsPurchased * cupPrice;

totalPlateCost = platesPurchased * platePrice;

subtotal = totalCupCost + totalPlateCost;

totalCost = subtotal * TAX_RATE + subtotal;
  
//calculate total tax on the purchase of the above goods
  
totaltax = totalCost - subtotal;
  
//calculate totalCupCost % cupPrice
  
modulo = totalCupCost % cupPrice; // this must be equal to zero because if we multiply totalCupCost with cupprice the remainder will be zero
  

//display total cost

cout << "Total cost: $" << totalCost;
  
//display total tax
cout << "Total tax on the purchase is: $" << totaltax;
  
  
//display the modulo value which is zero
  
cout << "the modulo value is : " << modulo;
  
  
  

return 0;
}