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  1. //Cameron Pham             CS1A                       Chapter 6, p. 374, #17
  2. //
  3. /******************************************************************************
  4. * ESTIMATE COST OF PAINT JOB
  5. * ______________________________________________________________________________
  6. * This program accepts floating values for number of rooms and cost of paint per 
  7. * gallon. It will then calculate the total cost of the paint job. 
  8. * ______________________________________________________________________________
  9. * INPUT
  10. * Rooms					// Number of rooms that need to be painted
  11. * Paint cost			// Cost of paint per gallon
  12. * 
  13. * OUTPUT
  14. * Total cost			// Total cost of paint job
  15. * 
  16. *******************************************************************************/
  17. #include <iostream>
  18. #include <iomanip>
  19. #include <cmath>
  20. using namespace std;
  21.  
  22. // Constant values
  23. const double sqftPerGallon = 115.0;
  24. const double hrsPerGallon = 8.0;
  25. const double hourlyLaborRate = 18.00;
  26.  
  27. // Function prototypes
  28. int getNumRooms();
  29. double getPaintPrice();
  30. double getWallSpace(int room);
  31. double calculateGallons(double totalSquareFeet);
  32. double calculateLaborHours(double gallons);
  33. double calculatePaintCost(double gallons, double pricePerGallon);
  34. double calculateLaborCost(double laborHours);
  35.  
  36. int main()
  37. {
  38.     // Initialize variables
  39.     int rooms;                  // Number of rooms to paint
  40.     double paintPrice;          // Price per gallon of paint
  41.     double wallSpace;           // Wall space in each room
  42.     double totalSquareFeet = 0; // Total wall space
  43.     double gallons;             // Gallons of paint required
  44.     double laborHours;          // Hours of labor required
  45.     double paintCost;           // Total cost of paint
  46.     double laborCost;           // Total labor charges
  47.     double totalCost;           // Total cost of the paint job
  48.  
  49.     // Get the number of rooms and paint price
  50.     rooms = getNumRooms();
  51.     paintPrice = getPaintPrice();
  52.  
  53.     // Get the wall space for each room
  54.     for (int room = 1; room <= rooms; room++)
  55.     {
  56.         wallSpace = getWallSpace(room);
  57.         totalSquareFeet += wallSpace;
  58.     }
  59.  
  60.     // Calculate the paint and labor requirements
  61.     gallons = calculateGallons(totalSquareFeet);
  62.     laborHours = calculateLaborHours(gallons);
  63.  
  64.     // Calculate the costs
  65.     paintCost = calculatePaintCost(gallons, paintPrice);
  66.     laborCost = calculateLaborCost(laborHours);
  67.     totalCost = paintCost + laborCost;
  68.  
  69.     // Display the results
  70.     cout << fixed << setprecision(2);
  71.     cout << endl;
  72.     cout << "Gallons of paint required: " << gallons << endl;
  73.     cout << "Hours of labor required: " << laborHours << endl;
  74.     cout << "Cost of paint: $" << paintCost << endl;
  75.     cout << "Labor charges: $" << laborCost << endl;
  76.     cout << "Total cost of paint job: $" << totalCost << endl;
  77.  
  78.     return 0;
  79. }
  80.  
  81. // Ask for the number of rooms and validate the input
  82. int getNumRooms()
  83. {
  84.     int rooms;
  85.  
  86.     cout << "Enter the number of rooms to be painted: ";
  87.     cin >> rooms;
  88.     cout << endl;
  89.  
  90.     while (rooms < 1)
  91.     {
  92.         cout << "Please enter at least 1 room: ";
  93.         cin >> rooms;
  94.     }
  95.  
  96.     return rooms;
  97. }
  98.  
  99. // Ask for the price of paint per gallon and validate the input
  100. double getPaintPrice()
  101. {
  102.     double price;
  103.  
  104.     cout << "Enter the price of paint per gallon (at least $10.00): $";
  105.     cin >> price;
  106.     cout << endl;
  107.  
  108.     while (price < 10.00)
  109.     {
  110.         cout << "Price must be at least $10.00. Enter again: $";
  111.         cin >> price;
  112.     }
  113.  
  114.     return price;
  115. }
  116.  
  117. // Ask for the wall space in a room and validate the input
  118. double getWallSpace(int room)
  119. {
  120.     double squareFeet;
  121.  
  122.     cout << "Enter the square feet of wall space in room "
  123.          << room << ": ";
  124.     cin >> squareFeet;
  125.     cout << endl;
  126.  
  127.     while (squareFeet < 0)
  128.     {
  129.         cout << "Square footage cannot be negative. Enter again: ";
  130.         cin >> squareFeet;
  131.     }
  132.  
  133.     return squareFeet;
  134. }
  135.  
  136. // Calculate gallons of paint needed, rounding up to a whole gallon
  137. double calculateGallons(double totalSquareFeet)
  138. {
  139.     return ceil(totalSquareFeet / sqftPerGallon);
  140. }
  141.  
  142. // Calculate the labor hours required
  143. double calculateLaborHours(double gallons)
  144. {
  145.     return gallons * hrsPerGallon;
  146. }
  147.  
  148. // Calculate the total cost of paint
  149. double calculatePaintCost(double gallons, double pricePerGallon)
  150. {
  151.     return gallons * pricePerGallon;
  152. }
  153.  
  154. // Calculate the total labor charges
  155. double calculateLaborCost(double laborHours)
  156. {
  157.     return laborHours * hourlyLaborRate;
  158. }
Success #stdin #stdout 0.01s 5288KB
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Enter the number of rooms to be painted: 
Enter the price of paint per gallon (at least $10.00): $
Enter the square feet of wall space in room 1: 
Enter the square feet of wall space in room 2: 
Enter the square feet of wall space in room 3: 

Gallons of paint required: 1.00
Hours of labor required: 8.00
Cost of paint: $25.00
Labor charges: $144.00
Total cost of paint job: $169.00
https://ideone.com/z0QB3x
Chapter 6, p. 374, #17
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

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