Candy Sale Program

 1// Program    : Candy Sale (v.2)
 2// Author     : Prof. Krofchok
 3// Date       : Fall 2025
 4// Description: This program implements the "Candy Sale" problem from the "Can
 5//              You Think Like a Computer?" exercise. Modules are used to break
 6//              things down into small pieces.
 7
 8#include <iomanip>
 9#include <iostream>
10
11void input_data(int &pounds);
12void perform_calculations(int pounds, double &total);
13void output_results(int pounds, double total);
14
15int main()
16{
17    int pounds;    // pounds of candy purchased
18    double total;  // total price of the candy purchased
19
20    input_data(pounds);
21    perform_calculations(pounds, total);
22    output_results(pounds, total);
23}
24
25//
26// An input module that gets the pounds of candy purchased from the user.
27//
28void input_data(int &pounds)
29{
30    std::cout << "Enter pounds of truffles purchased: ";
31    std::cin >> pounds;
32}
33
34//
35// A processing module that computes the total based on the number of pounds
36// purchased. Refer to the original exercise for details.
37//
38void perform_calculations(int pounds, double &total)
39{
40    if (pounds <= 5) {
41        total = pounds * 20;
42    }
43    else {
44        total = 100.00;
45        pounds = pounds - 5;
46        total = total + (pounds * 12.00);
47    }
48}
49
50//
51// An output module that displays the pounds of truffles purchased and the
52// total.
53//
54void output_results(int pounds, double total)
55{
56    std::cout << std::fixed << std::setprecision(2);
57    std::cout << "The total for "
58              << pounds
59              << " pound(s) of truffles is $"
60              << total
61              << std::endl;
62}