this is the first project that my questions based off of: #include<iostream> usi

Question

this is the first project that my questions based off of:



#include<iostream>
using namespace std;

struct record
{
double quiz_1;
double quiz_2;
double midyear, midyear_one;
double final, final_average;
double quiz_average;
char final_grade;
double total_grade;
};

void input(record& the_grades);
void output(record& the_grades);

int main()
{
record grades;

input(grades);
output(grades);

return 0;
}



void input(record& the_grades)
{
cout <<"To get your final output grade input all your scores ";
cout << "Enter quiz_1 grade out of 10 points: ";
cin >> the_grades.quiz_1;
cout << "Enter quiz_2 grade out of 10 points: ";
cin >> the_grades.quiz_2;
cout << "Enter midyear Exam grade out of 100 points: ";
cin >> the_grades.midyear;

cout << "Enter Final Exam grade out of 100 points: ";
cin >> the_grades.final;

}
void output(record& the_grades)
{
the_grades.quiz_average = (((the_grades.quiz_1/10) + (the_grades.quiz_2/10))/2) * .25;
the_grades.final_average = (the_grades.final/100) * .5;
the_grades.midyear_one = (the_grades.midyear/100) *.25;
the_grades.total_grade = the_grades.quiz_average + the_grades.final_average + the_grades.midyear_one;

cout << endl << endl;
cout <<"quiz_1: "<< the_grades.quiz_1 <<"/10";
cout << endl;
cout <<"quiz_2: "<< the_grades.quiz_2 <<"/10";
cout << endl;
cout <<"Midyear exam: " << the_grades.midyear<<"/100";
cout << endl;
cout <<"Final exam: " << the_grades.final<<"/100";
cout << endl;
cout <<"Final grade: "<< "%" << the_grades.total_grade*100;
cout << endl;
cout <<"Letter grade: ";

if(the_grades.total_grade*100 < 60)
{
cout << "F";
}
if((the_grades.total_grade*100 > 60)&&(the_grades.total_grade*100 < 70))
{
cout << "D";
}
if((the_grades.total_grade*100 > 70)&&(the_grades.total_grade*100 < 80))
{
cout << "C";
}
if((the_grades.total_grade*100 > 80)&&(the_grades.total_grade*100 < 90))
{
cout << "B";
}
if(the_grades.total_grade*100 > 90)
{
cout << "A";
}
cout << endl;


}




redo programming project 1 (or do it for the first time), but this time make the student record type a class type rather than a structure type. the student record class should have member variables for all the input data described in programing project 1 and a member variable for the student's weighted average numeric score for the entire course as well as a member variable for the students final letter grade. make all member variables private. include member functions for each of the following: member functions to set each of the member variables to values given as an argument(s) to the function, member functions to retrieve the data from each of the member variables , a void function that calculates the student's weighted average numeric score for the entire course and sets the corresponding member variable, and a void function that calculates the students final letter grade and sets the corresponding member variable.

Explanation / Answer

#include <iostream>

using namespace std;

const int CLASS_SIZE = 5;

class StudentRecord

{

private: int studentNumber;

double quiz1;

double quiz2;

double midterm;

double final;

double average;

char grade;

public:

void input(StudentRecord& student);

void computeGrade(StudentRecord& student);

void output(const StudentRecord student);

};

int main()

{

StudentRecord student[CLASS_SIZE];

for(int i = 0; i < CLASS_SIZE; i++)

student[i].input(student[i]);

for(int i = 0; i < CLASS_SIZE; i++)

{

student[i].computeGrade(student[i]);

student[i].output(student[i]);

cout << endl;

}

system("pause");

}

void StudentRecord:: input(StudentRecord &student)

{

cout << "Enter student number: ";

cin >> student.studentNumber;

cout << " Enter two 10 point quizes" << endl;

cin >> student.quiz1 >> student.quiz2;

cout << " Enter the midterm and final exam grades." << "These are 100 point tests ";

cin >> student.midterm >> student.final;

}

void StudentRecord:: computeGrade(StudentRecord& student)

{

double quizAvg= (student.quiz1 + student.quiz2)/2.0;

double quizAvgNormalized = quizAvg * 10;

student.average = student.final * 0.5 +

student.midterm * 0.25 +quizAvgNormalized * 0.25;

char letterGrade[]= "FFFFFFDCBAA";

int index = static_cast<int>(student.average/10);

if(index < 0 || 10 <= index)

{

cout << "Bad numeric grade: "

<< student.average << endl

<< " Aborting. ";

abort();

}

student.grade = letterGrade[index];

}

void StudentRecord:: output(const StudentRecord student)

{

cout << "The record for student number: " << student.studentNumber << endl;

cout<< "The quiz of grades are: " << student.quiz1 << " " << student.quiz2 << endl;

cout<< "The midterm and exam grades are: " << student.midterm << " " << student.final << endl;

cout<< "The numeric average is: " << student.average << endl;

cout<< "Grade assigned is "<< student.grade<< endl;

}

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