C++

Forum

 
Class and Functions help

theguyguy22 (3)
Hi, for class i was given an assignment to create a program using a class called student and various methods within it. The purpose is too calculate a grade based on points earned within the class, and to create 4 already created objects and to try and match the output given, which is:
The first Student object

Rando
Program Average: 84.75
Exam + Quiz Average: 95.63
Course Average: 92.36
Letter Grade: A


The second Student object

Pat Jones
Program Average: 52.38
Exam + Quiz Average: 67.88
Course Average: 63.23
Letter Grade: F


The third Student object

Chris Wilson
Program Average: 100.00
Exam + Quiz Average: 100.00
Course Average: 100.00
Letter Grade: A


The fourth Student object

Jarret Jack
Program Average: 0.00
Exam + Quiz Average: 0.00
Course Average: 0.00
Letter Grade: F

Jarret Jack
Program Average: 70.61
Exam + Quiz Average: 77.63
Course Average: 75.52
Letter Grade: C

but when i compile my output looks extremely different. The main issue seems to be the methods, and the strcpy function. I have been trying to slowly find a solution, but after making lots of simple fixes iam now stuck and don't know how proceed any help would be appreciated. If you need to see the output i see just ask and ill post it, thanks.

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
 
#include <iostream>
#include <iomanip>
#include <string.h>

using namespace std;
const int PGM_POINTS = 905;
const int QUIZ_POINTS = 120;
const int MAX_SUM = 20;
const double EXAM_POINTS = 300;

class student{
	public:
		student (const char [], int, int, int, double);
		void setPgmPts (int newPgmPts);
		void setQuizPts (int newQuizPts);
		void setSum2Low (int newSum2Low);
		void setExamPts (double newExamPts);
		double calcPgmAverage ();
		double calcExamAndQuizAverage();
		double calcCourseAverage ();
		char letterGrade ();
		void printStudent ();
	private:
		char name [50];
		int pgmPts;
		int quizPts;
		int sum2Low;
		double examPts;
		
			
};
int main(){

	student s1 = student ("Rando", 767 , 106, 10, 286.50);
	student s2 = student ("Pat Jones", 474, 53, 0, 218.50);
	student s3 = student ("Chris Wilson", 905, 120, 20, 300.00);
	student s4 = student ("Jarret Jack", 906, 121, 21, 301);
	cout << "The First Student" << endl;
	s1.printStudent();
	cout << "The Second Student" << endl;
	s2.printStudent();
	cout << "The Third Student" << endl;
	s3.printStudent();
	cout << "The Fourth Student" << endl;
	s4.printStudent();
	s4 = student ("Jarret Jack", 639, 107, 8, 211.50);
	s4.printStudent();
	return 0;
}

void student::setPgmPts(int newPgmPts){
	if (pgmPts < 0 or pgmPts > PGM_POINTS){
		newPgmPts = 0;
		cout << "Errror in setPgmPts: argument is invalid" << endl;;
	}
	else {
	
	newPgmPts = pgmPts;
	}	
}

void student::setQuizPts(int newQuizPts){
	if (quizPts < 0 && quizPts > QUIZ_POINTS){
		newQuizPts = 0;
		cout << "Error in setQuizPts: argument is invalid" << endl;
	}
	else {
		newQuizPts = quizPts;
	}
}

void student::setSum2Low(int newSum2Low){
	if (sum2Low < 0 && sum2Low > MAX_SUM){
		newSum2Low = 0;
		cout << "Error in setSum2Low: argument is invalid" << endl;
	}
	else {
		newSum2Low = sum2Low;
	}
}

void student::setExamPts(double newExamPts){
	if (examPts < 0 && examPts > EXAM_POINTS){
		newExamPts = 0;
		cout << "Error in setExamPts: argument is invlid" << endl;
	}
	else {
		newExamPts = examPts;
	}
}

double student::calcPgmAverage(){
	double i;
	i = (pgmPts / PGM_POINTS) * 100;
	return i;
}

double student::calcExamAndQuizAverage(){
	double i;
	i = (examPts+quizPts-sum2Low)/(EXAM_POINTS+QUIZ_POINTS-MAX_SUM) * 100;
	return i;
}
double student::calcCourseAverage(){
	double i;
	i = (.30 *((pgmPts / PGM_POINTS) * 100)) + (.70 *((examPts+quizPts-sum2Low)/(EXAM_POINTS+QUIZ_POINTS-MAX_SUM) * 100));
	return i;
}

char student::letterGrade(){
	double i;
	char f;
	i = (.30 *((pgmPts / PGM_POINTS) * 100))+ (.70*((examPts+quizPts-sum2Low)/(EXAM_POINTS+QUIZ_POINTS-MAX_SUM) * 100));
	
	if (i >= 90 && i <= 100){
		f = 'A';
	}
	else if (i >= 80 && i <=90){
		f = 'B';
	}
	else if (i >= 70 && i<= 80){
		f = 'C';
	}
	else if (i >= 60 && i <= 70){
		f = 'D';
	}
	else {
		f = 'F';
	}
	return f;
}
void student::printStudent(){
	for (int i = 0; i < strlen(name); i++){
		cout << name[i];
	}
	cout << endl << "	Program Average:	  " << calcPgmAverage () << endl;
	cout << "	Exam + Quiz Average:      " << calcExamAndQuizAverage() << endl;
	cout << "	Course Average:		  " << calcCourseAverage() << endl;
	cout << "	Letter Grade:		  " << letterGrade() << endl;
	
	
}
student::student(const char [], int pgmPts, int quizPts, int sum2Low, double examPts){
	strcpy (name, "Rando");
	setPgmPts(pgmPts);
	setQuizPts(quizPts);
	setSum2Low(sum2Low);
	setExamPts(examPts);
}
Last edited on
AbstractionAnon (6954)
Please don't double post.
http://www.cplusplus.com/forum/beginner/190483/

It wastes everybody's time.
Topic archived. No new replies allowed.