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#include <iostream>
#include <cmath>
#include <iomanip>
#include <cstdlib>
using namespace std;
const double quizWeight = 12.5, midtermWeight = 25.0, finalWeight = 50.0; // These weights are percentages of the final course grade.
class student_record
{
private:
double quiz1, quiz2, midterm, finalExam; // Actual score for the tests.
double quiz1Points, quiz2Points, midTermPoints, finalExamPoints; // Points earned from respective tests.
double percentFinalGrade; // Final grade in percentage
char finalGrade; // Final grade after setLetterGrade
public:
void Introduction(); // Program Introduction
void setScores(); // Takes user input and sets the score value for quizzes and exams, has loop mechanism
void scoreToPoints(); // Converts all student scores to points earned
void setPercentGrade(); // Converts points earned to a total grade percentage for the class
void setLetterGrade(); // Converts percentFinalGrade to finalGrade (A, B, C, D, F)
void closingOutput(); // Displays all information to the user
};
int main()
{
student_record current_record;
current_record.Introduction();
char choice;
do
{
current_record.setScores();
current_record.scoreToPoints();
current_record.setPercentGrade();
current_record.setLetterGrade();
current_record.closingOutput();
cout << "Would you like to enter new grades? (Y or N): ";
cin >> choice;
cout << endl;
} while (choice == 'Y' || choice == 'y');
return 0;
}
void student_record::Introduction()
{
cout << setw(47) << "<::PROGRAM INFO::>" << endl
<< "The student record program allows you to enter 2 quiz scores, a midterm score\n and a final exam score for your students. The program will then calculate"
<< "\nthe students final grade for the course and output a letter grade.\n"
<< "Enjoy!" << endl << endl;
}
void student_record::setScores()
{
char correct;
do {
cout << "Please round score inputs to within 2 decimal points, such as 95.55." << endl;
cout << "Enter the students score for quiz one: " << endl;
cin >> quiz1;
cout << "Enter the students score for quiz two: " << endl;
cin >> quiz2;
cout << "Enter the students midterm score: " << endl;
cin >> midterm;
cout << "Enter the students final exam score: " << endl;
cin >> finalExam;
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);
cout << "You entered: \n\n" << "Quiz 1: " << "Quiz 2: " << "Midterm: " << "Final Exam: " << endl
<< quiz1 << setw(11) << quiz2 << setw(14) << midterm << setw(14) << finalExam << endl
<< "Is this correct? (Y or N): " << endl;
cin >> correct;
}
while (correct == 'n' || correct == 'N');
}
void student_record::scoreToPoints()
{
quiz1Points = 10 * (quiz1 / 100);
quiz2Points = 10 * (quiz2 / 100);
midTermPoints = midterm;
finalExamPoints = finalExam;
}
void student_record::setPercentGrade()
{
double quiz1Worth, quiz2Worth, midTermWorth, finalExamWorth;
quiz1Worth = (quiz1Points / 10) * quizWeight;
quiz2Worth = (quiz2Points / 10) * quizWeight;
midTermWorth = (midTermPoints /100) * midtermWeight;
finalExamWorth = (finalExamPoints / 100) * finalWeight;
percentFinalGrade = (quiz1Worth + quiz2Worth) + (midTermWorth + finalExamWorth);
}
void student_record::setLetterGrade()
{
if(percentFinalGrade >= 90)
{
finalGrade = 'A';
}
else if (percentFinalGrade >= 80 && percentFinalGrade < 90)
{
finalGrade = 'B';
}
else if (percentFinalGrade >= 70 && percentFinalGrade < 80)
{
finalGrade = 'C';
}
else if (percentFinalGrade >= 60 && percentFinalGrade < 70)
{
finalGrade = 'D';
}
else {
finalGrade = 'F';
}
}
void student_record::closingOutput()
{
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout.precision(2);
cout << "\nThe students scores were: \n" << "Quiz 1: " << "Quiz 2: " << "Midterm: " << "Final Exam: " << endl
<< " " << quiz1 << setw(11) << quiz2 << setw(12) << midterm << setw(14) << finalExam << endl << endl
<< "<<::Average Grade::>>" << endl << setw(12) << percentFinalGrade << endl
<< "The students final letter grade is: " << finalGrade << endl;
}
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