1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
#include<iostream>
#include<string>
#include<iomanip>
using namespace std;
//------------------------------------------------------------------------------
int main()
{
const int MAX_STUDENTS = 32;
/* TODO - Step 1
Declare 2 arrays, with the data types listed below - each
holding as many values as determined by the constant declared above:
- array of string, for the student names
- array of int, for the final exam scores
*/
// Parallel array declarations
string STUDENT_NAME[MAX_STUDENTS];
int FINAL_SCORES[MAX_STUDENTS];
// These variables will hold array index values
int currentStudentIndex = 0; // used when user enters data to retain current array index
int lowestScoreIndex = 0; // array index that points to the student with the lowest score
// Loop control variable, holds 'y' if user wants to add another student
char again;
/* TODO - Step 2
Complete the DO...WHILE loop that has been started here (below this comment).
You will need to scroll DOWN, after STEP 8, where the following line is commented out:
//} while (expression);
Uncomment the line and change "expression" so the loop repeats if:
- the user indicated they want to add another student, AND
- fewer than MAX_STUDENTS have been added
*/
do
{
/* TODO - Step 3
Output prompt to tell user which student they are entering a final exam score for
*/
cout << "Enter Student #" << (currentStudentIndex + 1) << " Info" << endl;
/* TODO - Step 4
- Prompt the user for the student's name
- Read the user's answer and store to the correct array in the correct location
*/
cout << "Student Name: ";
cin >> STUDENT_NAME[currentStudentIndex];
/* TODO - Step 5
- Prompt the user for this student's final exam score
- Read the user's answer and store to the correct array in the correct location
*/
cout << "Final Exam Score: ";
cin >> FINAL_SCORES[currentStudentIndex];
/* TODO - Step 6
Write a WHILE loop to validate the user's entry. If the user's entry for the final
exam score was less than 0 or higher than 100, then:
- Display an error message (example in 2nd and 3rd student Sample Output below)
- Read the user's answer again and store to the correct array in the same location
*/
while (FINAL_SCORES[currentStudentIndex] < 0 || FINAL_SCORES[currentStudentIndex] > 100);
{
cout << "Exam score must be 0-100. Re-enter: ";
cin >> FINAL_SCORES[currentStudentIndex];
}
/* TODO - Step 7
Increment the index that is being used for the parallel arrays, readying it for
the next time around loop
*/
currentStudentIndex++;
/* TODO - Step 8
If the parallel array index is still less than the max number of students allowed
(as identified by the MAX_STUDENTS constant), then
- ask the user if they want to enter another student
- read the user's answer from the keyboard
- convert the user's answer to lower case and store it back to the loop control variable (again)
*/
if (currentStudentIndex < MAX_STUDENTS)
{
cout << "Do you want to enter another student (y/n): ";
cin >> again;
again = tolower(again);
}
cin.ignore(100, '\n');
cout << endl;
} while (again == 'y' && currentStudentIndex < MAX_STUDENTS);
// END OF THE DO...WHILE LOOP
// This is the spot that Step 2 told you to look for and change
// Display the header for the chart
cout << endl;
cout << "Student Exam Grade" << endl;
cout << "=========================" << endl;
cout << fixed;
/* TODO - Step 9
Write a for loop that will loop based on the number of students entered above.
*/
for (int i = 0; i < currentStudentIndex; i++)
{
/* TODO - Step 10
Write an if...else if...else statement to determine the current student's
final exam grade (90+ = A, 80+ = B, etc.)
NOTE: You will need to declare a variable here, with an appropriate data
type, to hold the current student's grade for their final exam score.
*/
char grade;
if (FINAL_SCORES[currentStudentIndex] >= 90)
grade = 'A';
else if (FINAL_SCORES[currentStudentIndex] >= 80)
grade = 'B';
else if (FINAL_SCORES[currentStudentIndex] >= 70)
grade = 'C';
else if (FINAL_SCORES[currentStudentIndex] >= 60)
grade = 'D';
else
grade = 'F';
/* TODO - Step 11
Output the student's name, final exam score, and final exam grade as a single line to the console
Use setw and any necessary output manipulator(s) to exactly match the Sample Output.
DO NOT include any string literals to force spacing to work!
*/
cout << left << setw(18) << STUDENT_NAME[i];
cout << right << setw(2) << FINAL_SCORES[i] << endl;
cout << right << setw(3) << grade << endl;
/* TODO - Step 12
If the score for the current student is lower than the final exam
score pointed to by lowestScoreIndex, then
- save the current loop index as the new lowestScoreIndex
*/
if (FINAL_SCORES[i] < FINAL_SCORES[lowestScoreIndex])
lowestScoreIndex = i;
// End of the for loop
}
/* TODO - Step 13
Display the line identifying the student with the lowest score
(as determined in the loop above)
*/
cout << endl;
cout << "The student with the lowest Final Exam score was: " << STUDENT_NAME[lowestScoreIndex] << endl;
cout << endl;
return 0;
}
/* Sample Output
Enter Student #1 Info
Name: Mickey
Final Exam Score: 98
Do you want to enter another student (y/n): y
Enter Student #2 Info
Name: Goofy
Final Exam Score: -20
Exam score must be 0-100. Re-enter: 53
Do you want to enter another student (y/n): y
Enter Student #3 Info
Name: Donald
Final Exam Score: 850
Exam score must be 0-100. Re-enter: 85
Do you want to enter another student (y/n): y
Enter Student #4 Info
Name: Pluto
Final Exam Score: 77
Do you want to enter another student (y/n): y
Enter Student #5 Info
Name: Gaston
Final Exam Score: 60
Do you want to enter another student (y/n): n
Student Exam Grade
=========================
Mickey 98 A
Goofy 53 F
Donald 85 B
Pluto 77 C
Gaston 60 D
The student with the lowest Final Exam score was: Goofy
Press any key to continue . . .
*/
|
