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  1. #include <iostream>
  2. #include <iomanip>
  3. using namespace std;
  4.  
  5. /*******************************************************************************
  6.  *
  7.  * Project #2 – Repetition & Switch Statement
  8.  *
  9.  * This program will obtain from the user, a list of Letter Grades then display the 
  10.  * Total Points and GPA then, and then loop 3 times.
  11.  * 
  12.  *
  13.  *
  14.  *
  15.  * Computations are based on
  16.  * TotalPoints = Total Points + Grade Value
  17.  * GPA = Total Points / Grade Count
  18.  *
  19.  * _____________________________________________________________________________
  20.  * INPUT
  21.  * 	  LetterGrade  : Letter grades from A,B,C,D,F, or X to end list, 
  22.  *					 entered by the User
  23.  *
  24.  *
  25.  *
  26.  * OUTPUT
  27.  * 	  TotalPoints  : Total accumulated points converted through the LetterGrades
  28.  * 	  GPA  		   : Grade Point Average for the list of Grades
  29.  *
  30.  *
  31.  ******************************************************************************/
  32.  
  33. int main() {
  34.     char LetterGrade;	// Letter Grades to be entered by the user
  35.  
  36.     // Outer loop runs 3 times for the 3 test runs
  37.     for (int LoopCount = 0; LoopCount <= 2; LoopCount++) {
  38.         double TotalPoints = 0.0;	// Total  value of all letter grades in list
  39.         double GPA = 0.0;        // Average of points in list 
  40.         int GradeCount = 0;       // Amount of grades entered by user
  41.         bool KeepGoing = true;	// Flag to control grades entry loop
  42.  
  43.         // Test header
  44.         cout << "TEST #" << (LoopCount + 1) << ":" << endl << endl;
  45.  
  46. 		// Continuously collects grades until 'X' or 'x' is entered
  47.         while (KeepGoing) {
  48.             cout << "Enter Letter Grade (enter 'X' to exit): " << endl;
  49.             cin >> LetterGrade;		// Gathers Letter Grade inputs
  50.  
  51.             switch (LetterGrade) {	// Converting Letter Grades to numeric values
  52.                 case 'A': 
  53.                 case 'a': // Included lowercase just in case users type lowercase
  54.                     TotalPoints += 4.0; 
  55.                     GradeCount += 1; 
  56.                     break;
  57.                 case 'B': 
  58.                 case 'b':
  59.                     TotalPoints += 3.0; 
  60.                     GradeCount += 1; 
  61.                     break;
  62.                 case 'C': 
  63.                 case 'c':
  64.                     TotalPoints += 2.0; 
  65.                     GradeCount += 1; 
  66.                     break;
  67.                 case 'D': 
  68.                 case 'd':
  69.                     TotalPoints += 1.0; 
  70.                     GradeCount += 1; 
  71.                     break;
  72.                 case 'F': 
  73.                 case 'f':
  74.                     TotalPoints += 0.0; 
  75.                     GradeCount += 1; 
  76.                     break;
  77.                 case 'X':
  78.                 case 'x':
  79.                     KeepGoing = false; 
  80.                     break;
  81.                 default: 
  82.                     cout << endl << "Invalid letter grade, please try again" << endl << endl;
  83.             }
  84.         }
  85.  
  86.         // Prevent division by zero if they enter X immediately
  87.         if (GradeCount > 0) {
  88.             GPA = TotalPoints / GradeCount;
  89.         } else {
  90.             GPA = 0.0;
  91.         }
  92. 		// Displaying Total Points and GPA
  93.         cout << endl;
  94.         cout << "Total Grade Points: " << TotalPoints << endl;
  95.         cout << fixed << setprecision(2);
  96.         cout << "GPA: " << GPA << endl;
  97.  
  98.         // Triple space between loops
  99.         if (LoopCount < 2) {
  100.             cout << endl << endl << endl;
  101.         }
  102.     }
  103.  
  104.     return 0;
  105. }
Success #stdin #stdout 0s 5320KB
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stdout
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TEST #1:

Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 

Total Grade Points: 11
GPA: 2.20



TEST #2:

Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 

Total Grade Points: 13.00
GPA: 2.60



TEST #3:

Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 
Enter Letter Grade (enter 'X' to exit): 

Total Grade Points: 10.00
GPA: 2.00
https://ideone.com/kAYluB
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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