Java Reference
In-Depth Information
Display 6.18
A Grade Book Class
(part 3 of 4)
58
for
(
int
quizNumber = 1;
59 quizNumber <= numberOfQuizzes; quizNumber++)
60 grade[studentNumber][quizNumber] =
61 a[studentNumber][quizNumber];
62 }
63 }
64
/**
65
Fills the array studentAverage using the data from the array grade.
66
*/
67
private void
fillStudentAverage()
68 {
69 studentAverage =
new
double[numberOfStudents];
70
for
(
int
studentNumber = 1;
71 studentNumber<=numberOfStudents;studentNumber++)
72 {
//Process one studentNumber:
73
double
sum = 0;
74
for
(
int
quizNumber = 1;
75 quizNumber <= numberOfQuizzes; quizNumber++)
76 sum = sum + grade[studentNumber - 1][quizNumber - 1];
77
//sum contains the sum of the quiz scores for student number
//studentNumber.
78 studentAverage[studentNumber - 1] = sum/numberOfQuizzes;
79
//Average for student studentNumber is
//studentAverage[studentNumber - 1]
80 }
81 }
82
/**
83
Fills the array quizAverage using the data from the array grade.
84
*/
85
private void
fillQuizAverage()
86 {
87 quizAverage =
new double
[numberOfQuizzes];
88
for
(
int
quizNumber = 1; quizNumber <= numberOfQuizzes; quizNumber++)
89 {
//Process one quiz (for all students):
90
double
sum = 0;
91
for
(
int
studentNumber = 1;
92 studentNumber <= numberOfStudents;
studentNumber++)
93 sum = sum + grade[studentNumber - 1][quizNumber - 1];
94
//sum contains the sum of all student scores on quiz number
//quizNumber.
95 quizAverage[quizNumber - 1] = sum/numberOfStudents;
96
//Average for quiz quizNumber is the value of
//quizAverage[quizNumber - 1]
97 }
98 }
(continued)
