Question

Write a grading program for the following grading policies:-

a. There are two quizzes, each graded on the basis of 10 points.

b. There is one midterm exam and one final exam, each graded on the basis of 100 points.

c. The final exam counts for 50 percent of the grade, the midterm counts for 25 percent and the two quizzes together count for a total of 25 percent.

Grading system is as follows:-

>90 A

>=80 and <90 B

>=70 and <80 C

>=60 and <70 D

<60 E

The program should read in the student's scores and output the student's record, which consists of two quiz and two exam scores as well as the student's average numeric score for the entire course and the final letter grade. Define and use a structure for the student record.

Utilize these function prototypes:-

void input(StudentRecord * student);  //should prompt for input for one student and set the structure variable members.

void computeGrade(StudentRecord * student); //use this to calculate the numeric average and letter grade.

void output(const StudentRecord student);  //outputs the student record.

Write a grading program for the following grading policies:-

a. There are two quizzes, each graded on the basis of 10 points.

b. There is one midterm exam and one final exam, each graded on the basis of 100 points.

c. The final exam counts for 50 percent of the grade, the midterm counts for 25 percent and the two quizzes together count for a total of 25 percent.

Grading system is as follows:-

>90 A

>=80 and <90 B

>=70 and <80 C

>=60 and <70 D

<60 E

The program should read in the student's scores and output the student's record, which consists of two quiz and two exam scores as well as the student's average numeric score for the entire course and the final letter grade. Define and use a structure for the student record.

Utilize these function prototypes:-

void input(StudentRecord * student);  //should prompt for input for one student and set the structure variable members.

void computeGrade(StudentRecord * student); //use this to calculate the numeric average and letter grade.

void output(const StudentRecord student);  //outputs the student record.

Answer 1

I’ve done all the testing and fixed the code. You can see the output.

Code:

#include <iostream>

#include <iomanip>

using namespace std;

struct StudentRecord{

double q1, q2;

double midterm, final;

double avg;

char grade;

};

//should prompt for input for one student and set the structure variable members.

void input(StudentRecord * student);

//use this to calculate the numeric average and letter grade.

void computeGrade(StudentRecord * student);

//outputs the student record.

void output(const StudentRecord student);

int main()

{

StudentRecord student;

input(&student);

computeGrade(&student);

output(student);

return 0;

}

void input(StudentRecord * student)

{

cout << "Please Enter marks for Quiz 1: ";

cin >> student->q1;

while(student->q1 < 0 || student->q1 > 10)

     { cout << "Must be between 0 and 10. Enter again: ";

        cin >> student->q1;

     }

cout << "Please Enter marks for Quiz 2: ";

cin >> student->q2;

while(student->q2 < 0 || student->q2 > 10)

     { cout << "Must be between 0 and 10. Enter again: ";

        cin >> student->q2;

     }

cout << "Please Enter marks for midterm: ";

cin >> student->midterm;

while(student->midterm < 0 || student->midterm > 100)

     { cout << "Must be between 0 and 100. Enter again: ";

        cin >> student->midterm;

     }

cout << "Please Enter marks for finals: ";

cin >> student->final;

while(student->final < 0 || student->final > 100)

     { cout << "Must be between 0 and 100. Enter again: ";

        cin >> student->final;

     }

}

void computeGrade(StudentRecord * student)

{

double p1 = (((student->q1 + student->q2) / 2) * 10) * 0.25;

double p2 = student->midterm * 0.25;

double p3 = student->final * 0.5;

student->avg = p1 + p2 + p3;

if (student->avg >= 90.0)

    student->grade = 'A';

else if (student->avg >= 80.0)

    student->grade = 'B';

else if (student->avg >= 70.0)

    student->grade = 'C';

else if (student->avg >= 60.0)

    student->grade = 'D';

else

    student->grade = 'F';

}

void output(const StudentRecord student)

{

cout << endl;

cout << setw(25) << left << "Quiz 1: " << student.q1 << endl;

cout << setw(25) << left << "Quiz 2: " << student.q2 << endl;

cout << setw(25) << left << "Midterm: " << student.midterm << endl;

cout << setw(25) << left << "Finals: " << student.final << endl;

cout << setw(25) << left << "Average: " << student.avg << endl;

cout << setw(25) << left << "Grade: " << student.grade << endl;

}

Output: