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  1. // Kurt Feiereisel				    CSC5				   Chapter 7, p.446, #11
  2. /*******************************************************************************
  3.  * 
  4.  * Calculate Student's Grades
  5.  * _____________________________________________________________________________
  6.  * This program allows a user to enter student's names and test grades for each
  7.  * student. The program will then calculate and report the student's average
  8.  * of the test grades and a letter grade.
  9.  * _____________________________________________________________________________
  10.  * Formula:
  11.  *		avg = total / TESTS 
  12.  * INPUT:
  13.  *  	names[]			: The names of the students
  14.  *		testscore[]		: The scores the student's recieved on their tests
  15.  *		total			: Each student's accumulated test scores
  16.  *    
  17.  * OUTPUT:
  18.  *		avg				: Average for each student's test scores
  19.  *		letter[]		: Each student's letter grade based on their average
  20.  *							test score
  21.  *	  
  22.  * 
  23.  * ****************************************************************************/
  24. #include <iostream>
  25. #include <string>
  26. using namespace std;
  27.  
  28. // Initialize Constants
  29. const int STUDS = 5;
  30. const int TESTS = 4;
  31.  
  32. // Function Prototypes
  33. void students(string names[]);
  34. void testGrades(float testscore[][TESTS], string names[]);
  35. void calcAvg(float averages[], float testscore[][TESTS],string names[]);
  36. void letterGrade(char letter[], float averages[]);
  37. void displayArray(float averages[], char letter[], string names[]);
  38.  
  39.  
  40. int main()
  41. {
  42. 	// Declare Arrays;
  43. 	string names[STUDS];			// INPUT: student's names
  44. 	float testscore[STUDS][TESTS];	// INPUT: Student's test scores
  45. 	float averages[STUDS];			// OUTPUT: Average score for each student
  46. 	char letter[STUDS];				// OUTPUT: Student's letter grade based on
  47. 											// test average
  48.  
  49. 	// Call Functions
  50. 	students(names);
  51. 	testGrades(testscore, names);
  52. 	calcAvg(averages, testscore, names);
  53. 	letterGrade(letter, averages);
  54. 	displayArray(averages, letter, names);
  55. 	return 0;
  56. }
  57.  
  58. /*
  59.  * Definition of students
  60.  * This function accepts input as student's names.
  61.  */
  62. void students(string n[])
  63. {
  64. 	// Input Student's Names
  65. 	for (int index = 0; index < STUDS; index++)
  66. 	{
  67. 		cout << "Please enter students names:" << endl;
  68. 		cin >> n[index];
  69. 	}
  70. }
  71.  
  72. /*
  73.  * Definition of testGrades
  74.  * This function accepts input as Test scores for each test for each
  75.  * student.
  76.  */
  77.  
  78. void testGrades(float t[][TESTS], string n[])
  79. {
  80. 	// Input Test Scores
  81. 	for (int index = 0; index < STUDS; index++)
  82. 	{
  83. 		cout << "Enter " << n[index] << " test scores: \n";
  84. 		for (int testIndex = 0; testIndex < TESTS; testIndex++)
  85. 		{
  86. 			cout << "Test " << (testIndex + 1) << ": ";
  87. 			cin >> t[index][testIndex];
  88.  
  89. 			// Input Verification
  90. 			while( (t[index][testIndex] < 0) || t[index][testIndex] > 100)
  91. 			{
  92. 				cout << "Please enter a grade between 0 and 100." << endl;
  93. 				cin >> t[index][testIndex];
  94. 			}
  95. 		}
  96. 		cout << endl;
  97. 	}
  98. }
  99.  
  100. /*
  101.  * Definition of calcAvg
  102.  * This function will calculate the averages foe each student
  103.  */
  104. void calcAvg(float a[], float t[][TESTS], string n[])
  105. {
  106. 	// Initialize Variables
  107. 	float total;
  108. 	float avg;
  109.  
  110. 	// Accumulate total score for each student
  111. 	for(int index = 0; index < STUDS; index++)
  112. 	{
  113. 		total = 0;
  114. 		for(int count = 0; count < TESTS; count++)
  115. 		{
  116. 			total += t[index][count];
  117. 		}
  118. 		// Calcluate Average for each student
  119. 		avg = total / TESTS;
  120.  
  121. 		// Store average for student in average array
  122. 		a[index] = avg;
  123. 	}
  124. }
  125.  
  126. /*
  127.  * Definition of letterGrade
  128.  * This function will take the averages of each student and convert it to a
  129.  * letter grade.
  130.  */
  131. void letterGrade(char l[], float a[])
  132. {
  133. 	// Determine Letter Grade based on Average
  134. 	for(int index = 0; index < STUDS; index++)
  135. 	{
  136. 		if(a[index] <= 100 && a[index] >= 90)
  137. 			l[index] = 'A';
  138. 		else if(a[index] < 90 && a[index] >= 80)
  139. 			l[index] = 'B';
  140. 		else if(a[index] < 80 && a[index] >= 70)
  141. 			l[index] = 'C';
  142. 		else if(a[index] < 70 && a[index] >= 60)
  143. 			l[index] = 'D';
  144. 		else if(a[index] < 60 && a[index] >= 0)
  145. 			l[index] = 'F';
  146. 		else
  147. 			cout << "Invalid" << endl;
  148. 	}
  149. }
  150. /*
  151.  * Definition of displayArray
  152.  * This function will display the letter grade and average grade of each student
  153.  */
  154. void displayArray(float a[], char l[], string n[])
  155. {
  156. 	// Display Student's names, averages, and letter grades
  157. 	for(int index = 0; index < STUDS; index++)
  158. 	{
  159. 		cout << n[index] << "'s" << " results:" << endl;
  160. 		cout << "\tScore: " << a[index] << endl;
  161. 		cout << "\tGrade: " << l[index] << endl;
  162. 	}
  163. }
Success #stdin #stdout 0s 5304KB
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stdin
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Billy
Bob
Joe
Smith
Tom
99
97
96
88
89
84
86
78
75
73
74
68
65
67
64
59
53
56
53
stdout
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Please enter students names:
Please enter students names:
Please enter students names:
Please enter students names:
Please enter students names:
Enter Billy test scores: 
Test 1: Test 2: Test 3: Test 4: 
Enter Bob test scores: 
Test 1: Test 2: Test 3: Test 4: 
Enter Joe test scores: 
Test 1: Test 2: Test 3: Test 4: 
Enter Smith test scores: 
Test 1: Test 2: Test 3: Test 4: 
Enter Tom test scores: 
Test 1: Test 2: Test 3: Test 4: 
Billy's results:
	Score: 95
	Grade: A
Bob's results:
	Score: 84.25
	Grade: B
Joe's results:
	Score: 72.5
	Grade: C
Smith's results:
	Score: 63.75
	Grade: D
Tom's results:
	Score: 40.5
	Grade: F
https://ideone.com/Ejs1M4
Grade Book
language:
C++ (gcc 8.3)
created:
11 days ago
visibility:
public

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