Design an Essay class that is derived from the GradedActivity class presented in

Question

Design an Essay class that is derived from the GradedActivity class presented in this chapter. The Essay class should determine the grade a student receives for an essay. The student's essay score be up tp 100 and is determined in the following manner: Grammer: 30 points Spelling: 20 points Correct length: 20 points Content: 30 points Demonstrate the class in a simple program.use virtual functions, use seperate headers and class files but zip them.

this is my .cpp file

#include "GradedActivity.h"

//******************************************************

// Member function GradedActivity::getLetterGrade *

//******************************************************

char GradedActivity::getLetterGrade() const

{

char letterGrade; // To hold the letter grade

if (score > 89)letterGrade = 'A';

else if (score > 79) letterGrade = 'B';

else if (score > 69) letterGrade = 'C';

else if (score > 59) letterGrade = 'D';

else letterGrade = 'F';

return letterGrade;

}

this is the .H file

#ifndef GRADEDACTIVITY_H

#define GRADEDACTIVITY_H

// GradedActivity class declaration

class GradedActivity

{

protected:

double score; // To hold the numeric score

public:

// Default constructor

GradedActivity()

{ score = 0.0; }

// Constructor

GradedActivity(double s)

{ score = s; }

// Mutator function

void setScore(double s)

{ score = s; }

// Accessor functions

virtual double getScore() const

{ return score; }

virtual char getLetterGrade() const;

};

#endif

Explanation / Answer

import java.util.Scanner;

public class GradedActivity
{
private double score;

public void setScore(double s)
{
score = s;
}

public double getScore()
{
return score;
}
public char getGrade()
{
char letterGrade;

if (score >= 90)
letterGrade = 'A';
else if (score >= 80)
letterGrade = 'B';
else if (score >= 70)
letterGrade = 'C';
else if (score >= 60)
letterGrade = 'D';
else
letterGrade = 'F';

return letterGrade;
}
}
public class Essay extends GradedActivity
{
private double grammar;
private double spelling;
private double correctLength;
private double content;

public void setScore(double gr, double sp, double len, double cnt)
{
setGrammar(gr);
setSpelling(sp);
setCorrectLength(len);
setContent(cnt);
super.setScore(grammar + spelling + correctLength + content);
}

private void setGrammar(double g)
{
if (g <= 30.0)
grammar = g;
else
grammar = 0.0;
}
private void setSpelling(double s)
{
if (s <= 20.0)
spelling = s;
else
spelling = 0.0;
}

private void setCorrectLength(double c)
{
if (c <= 20.0)
correctLength = c;
else
correctLength = 0.0;
}
private void setContent(double c)
{
if (c <= 30)
content = c;
else
content = 0.0;
}
public double getGrammar()
{
return grammar;
}
public double getSpelling()
{
return spelling;
}
public double getCorrectLength()
{
return correctLength;
}

public double getContent()
{
return content;
}
public double getScore()
{
return grammar + spelling + correctLength + content;
}
}

public class FinalExam extends GradedActivity

{
private int numQuestions;
private double pointsEach;
private int numMissed;

public FinalExam(int questions, int missed)
{
double numericScore;

numQuestions = questions;
numMissed = missed;

pointsEach = 100.0 / questions;
numericScore = 100.0 - (missed * pointsEach);

setScore(numericScore);
}

public double getPointsEach()
{
return pointsEach;
}

public int getNumMissed()
{
return numMissed;
}
}

public class PassFailActivity extends GradedActivity
{
private double minPassingScore;

public PassFailActivity(double mps)
{
minPassingScore = mps;
}

public char getGrade()
{
char letterGrade;

if (super.getScore() >= minPassingScore)
letterGrade = 'P';
else
letterGrade = 'F';

return letterGrade;
}
}
public class PassFailExam extends PassFailActivity
{
private int numQuestions;
private double pointsEach;
private int numMissed;

public PassFailExam(int questions, int missed, double minPassing)
{
super(minPassing);
double numericScore;
numQuestions = questions;
numMissed = missed;
pointsEach = 100.0 / questions;
numericScore = 100.0 - (missed * pointsEach);
setScore(numericScore);
}
public double getPointsEach()
{
return pointsEach;
}
public int getNumMissed()
{
return numMissed;
}
}

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