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  1. // Timothy Price				CS1A				Ch 7 challenge 9
  2. /*******************************************************************************
  3.  * Determine grade
  4.  * 
  5.  * This program receives character inputs and determines if a student has passed
  6.  * or failed.
  7.  * 
  8.  * Inputs:
  9.  *  Question answers
  10.  * 
  11.  * Outputs:
  12.  *  Pass or fail indication
  13.  *  Score
  14.  *  Incorrect answers
  15.  ******************************************************************************/
  16.  
  17. #include <iostream>
  18. #include <cctype> // Required for toupper()
  19.  
  20. using namespace std;
  21.  
  22. int main() {
  23.     const int NUM_QUESTIONS = 20;
  24.  
  25.     // Array storing the correct answers
  26.     char correctAnswers[NUM_QUESTIONS] = {
  27.         'B', 'D', 'A', 'A', 'C', 
  28.         'A', 'B', 'A', 'C', 'D', 
  29.         'B', 'C', 'D', 'A', 'D', 
  30.         'C', 'C', 'B', 'D', 'A'
  31.     };
  32.  
  33.     // Array to store the student's answers
  34.     char studentAnswers[NUM_QUESTIONS];
  35.  
  36.     cout << "-------------------------------------" << endl;
  37.     cout << "   DRIVER'S LICENSE EXAM GRADER      " << endl;
  38.     cout << "-------------------------------------" << endl << endl;
  39.  
  40.     // Get student answers with input validation
  41.     for (int i = 0; i < NUM_QUESTIONS; ++i) {
  42.         char ans;
  43.         do {
  44.             cout << "Question " << (i + 1) << ": ";
  45.             cin >> ans;
  46.             ans = toupper(ans); // Convert to uppercase for convenience
  47.             cout << ans << endl;
  48.  
  49. 			// Input validation
  50.             if (ans != 'A' && ans != 'B' && ans != 'C' && ans != 'D') {
  51.                 cout << "Invalid selection. Try again: " << endl;
  52.                 cin >> ans;
  53.             }
  54.         } while (ans != 'A' && ans != 'B' && ans != 'C' && ans != 'D');
  55.         studentAnswers[i] = ans;
  56.     }
  57.  
  58.     // Evaluation variables
  59.     int correctCount = 0;
  60.     int incorrectCount = 0;
  61.     int incorrectQuestions[NUM_QUESTIONS]; // numbers of wrong answers
  62.  
  63.     for (int i = 0; i < NUM_QUESTIONS; ++i) {
  64.         if (studentAnswers[i] == correctAnswers[i]) {
  65.             correctCount++;
  66.         } else {
  67.             incorrectQuestions[incorrectCount] = i + 1; 
  68.             incorrectCount++;
  69.         }
  70.     }
  71.  
  72.     // Display Results
  73.     cout << endl << "-------------------------------------" << endl;
  74.     cout << "           EXAM RESULTS              " << endl;
  75.     cout << "-------------------------------------" << endl;
  76.  
  77.     // Pass/Fail check (Passing score is 15 or more out of 20)
  78.     if (correctCount >= 15) {
  79.         cout << "Status: PASSED" << endl;
  80.     } else {
  81.         cout << "Status: FAILED" << endl;
  82.     }
  83.  
  84.     cout << "Total Answered Correctly:   " << correctCount << " / ";
  85.     cout << NUM_QUESTIONS << endl << "Total Answered Incorrectly: ";
  86.     cout << incorrectCount << " / " << NUM_QUESTIONS << endl;
  87.  
  88.     // Display list of incorrect questions, if any
  89.     if (incorrectCount > 0) {
  90.         cout << endl << "Questions answered incorrectly:" << endl;
  91.         for (int i = 0; i < incorrectCount; ++i) {
  92.             cout << "Question " << incorrectQuestions[i] << " (You answered: "; 
  93.             cout << studentAnswers[incorrectQuestions[i] - 1];
  94.             cout << ", Correct: " << correctAnswers[incorrectQuestions[i] - 1];
  95.             cout << ")" << endl;
  96.         }
  97.     } else {
  98.         cout << endl << "Congratulations! Perfect score!" << endl;
  99.     }
  100.  
  101.     cout << "-------------------------------------" << endl;
  102.  
  103.     return 0;
  104. }
Success #stdin #stdout 0.01s 5316KB
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-------------------------------------
   DRIVER'S LICENSE EXAM GRADER      
-------------------------------------

Question 1: B
Question 2: D
Question 3: A
Question 4: A
Question 5: C
Question 6: A
Question 7: B
Question 8: A
Question 9: C
Question 10: D
Question 11: B
Question 12: C
Question 13: D
Question 14: A
Question 15: D
Question 16: C
Question 17: C
Question 18: A
Question 19: C
Question 20: D

-------------------------------------
           EXAM RESULTS              
-------------------------------------
Status: PASSED
Total Answered Correctly:   17 / 20
Total Answered Incorrectly: 3 / 20

Questions answered incorrectly:
Question 18 (You answered: A, Correct: B)
Question 19 (You answered: C, Correct: D)
Question 20 (You answered: D, Correct: A)
-------------------------------------
https://ideone.com/4clA0U
ch7 - determine grade
language:
C++ (gcc 8.3)
created:
21 hours ago
visibility:
public

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