Java Reference
In-Depth Information
9
int
total =
0
;
// sum of grades
int
gradeCounter =
0
;
// number of grades entered
int
aCount =
0
;
// count of A grades
int
bCount =
0
;
// count of B grades
int
cCount =
0
;
// count of C grades
int
dCount =
0
;
// count of D grades
int
fCount =
0
;
// count of F grades
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Scanner input =
new
Scanner(System.in);
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System.out.printf(
"%s%n%s%n %s%n %s%n"
,
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"Enter the integer grades in the range 0-100."
,
21
"Type the end-of-file indicator to terminate input:"
,
22
"On UNIX/Linux/Mac OS X type <Ctrl> d then press Enter"
,
23
"On Windows type <Ctrl> z then press Enter"
);
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// loop until user enters the end-of-file indicator
26
while
(
input.hasNext()
)
27
{
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int
grade = input.nextInt();
// read grade
29
total += grade;
// add grade to total
30
++gradeCounter;
// increment number of grades
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// increment appropriate letter-grade counter
switch
(grade /
10
)
{
case
9
:
// grade was between 90
case
10
:
// and 100, inclusive
++aCount;
break
;
// exits switch
case
8
:
// grade was between 80 and 89
++bCount;
break
;
// exits switch
case
7
:
// grade was between 70 and 79
++cCount;
break
;
// exits switch
case
6
:
// grade was between 60 and 69
++dCount;
break
;
// exits switch
default
:
// grade was less than 60
++fCount;
break
;
// optional; exits switch anyway
}
// end switch
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}
// end while
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// display grade report
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System.out.printf(
"%nGrade Report:%n"
);
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Fig. 5.9
|
LetterGrades
class uses the
switch
statement to count letter grades. (Part 2 of 3.)
