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  1. // Torrez, Elaine                           CS1A                     Chapter 5 P. 297, #22
  2.  
  3. /******************************************************************************************
  4.  * 
  5.  * BUDGET ANALYSIS
  6.  * 
  7.  * --------------------------------------------------------------------------------
  8.  * This program asks the user to enter the amount budgeted for a month and then
  9.  * prompts the user to enter their expenses one by one. The program keeps a running
  10.  * total of expenses and, when finished, displays whether the user is over or under 
  11.  * budget, and by how much.
  12.  * --------------------------------------------------------------------------------
  13.  * 
  14.  * INPUT
  15.  *      budgetedAmount   : Amount the user planned to spend for the month
  16.  *      expense          : Each expense entered by the user
  17.  * 
  18.  * OUTPUT
  19.  *      totalExpenses    : The total of all entered expenses
  20.  *      difference       : Amount over or under budget
  21.  * 
  22.  *******************************************************************************************/
  23.  
  24. #include <iostream>
  25. #include <iomanip>
  26. #include <limits>
  27. using namespace std;
  28.  
  29. int main()
  30. {
  31.     double budgetedAmount;   // INPUT  - User’s monthly budget
  32.     double expense;          // INPUT  - Single expense value
  33.     double totalExpenses = 0; // PROCESS - Running total of expenses
  34.     char moreExpenses;       // CONTROL - User’s choice to continue entering expenses
  35.  
  36.     // --- Get the monthly budget ---
  37.     cout << "Enter the amount budgeted for this month: $";
  38.     while (!(cin >> budgetedAmount) || budgetedAmount < 0)
  39.     {
  40.         cout << "ERROR: Enter a positive number: $";
  41.         cin.clear();
  42.         cin.ignore(numeric_limits<streamsize>::max(), '\n');
  43.     }
  44.  
  45.     cout << "\nEnter your expenses one at a time.\n";
  46.  
  47.     // --- Expense input loop ---
  48.     do
  49.     {
  50.         cout << "Enter an expense amount: $";
  51.         while (!(cin >> expense) || expense < 0)
  52.         {
  53.             cout << "ERROR: Enter a positive number: $";
  54.             cin.clear();
  55.             cin.ignore(numeric_limits<streamsize>::max(), '\n');
  56.         }
  57.  
  58.         totalExpenses += expense;
  59.  
  60.         cout << "Do you have another expense? (Y/N): ";
  61.         cin >> moreExpenses;
  62.     } 
  63.     while (moreExpenses == 'Y' || moreExpenses == 'y');
  64.  
  65.     // --- Calculate difference ---
  66.     double difference = budgetedAmount - totalExpenses;
  67.  
  68.     cout << fixed << setprecision(2);
  69.     cout << "\n========== BUDGET SUMMARY ==========\n";
  70.     cout << "Budgeted: $" << budgetedAmount << endl;
  71.     cout << "Spent:    $" << totalExpenses << endl;
  72.  
  73.     if (difference > 0)
  74.         cout << "You are under budget by $" << difference << "!" << endl;
  75.     else if (difference < 0)
  76.         cout << "You are over budget by $" << (-difference) << "!" << endl;
  77.     else
  78.         cout << "You are exactly on budget!" << endl;
  79.  
  80.     cout << "====================================\n";
  81.  
  82.     return 0;
  83. }
  84.  
Success #stdin #stdout 0.01s 5320KB
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stdin
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stdout
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Enter the amount budgeted for this month: $
Enter your expenses one at a time.
Enter an expense amount: $Do you have another expense? (Y/N): 
========== BUDGET SUMMARY ==========
Budgeted: $1000.00
Spent:    $200.00
You are under budget by $800.00!
====================================
https://ideone.com/MlJYiC
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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