Question

Part 1: Implement Essay.h and demonstrate the Essay class The Essay class is derived from the GradedActivity class presented in chapter 15. The Essay class determines the grade a student receives on an essay. The student's essay score can be up to 100, and is determined in the following manner: Grammar: 30 points Spelling: 20 points Correct length: 20 points Content: 30 points Please follow these steps 1. Download GradedActivity.h, GradedActivity.cpp, and Essay.h from Moodle 2. Implement Essay.h by writing Essay.cpp. That is, provide bodies for 4 mutators and one virtual function void setGrammerPoints (double) void setSpellingPoints (double) void setLengthPoints (double) void setContentPoints (double) virtual char getLetterGrade) The file Essay.cpp should only contain those function bodies and you are NOT allowed to change anything in the files downloaded from Moodle. The details of getLetterGrade implementation will be discussed in class. 3. Write a program called demo.cpp: create an Essay object called report by using default constructor prompt and get input from user (e.g. an English professor) the grammar, spelling, correct length, and content points of the student's essay, i.e. report set the report's grammar points, spelling points, correct length points, and content points according to the input data display the grade of the report

this is the essay.h file

this is the gradedActivity.h file

this is the gradeActivity.cpp file

Can someone help me write the code for this in c++. I'm really struggling with this. If you can include comments and a screenshot of the test run it would be greatly appreciated

Answer 1

Note : code in bold is implemented as asked in the question

-------------------------------------

// Implementation file for the GradedActivity class

#include "GradedActivity.h"

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

// Member function GradedActivity::determineGrade *

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

char GradedActivity::getLetterGrade() const

{

char letterGrade;

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;

}

----------

demo

------------------------

#include <iostream>

#include "Essay.h"

using namespace std;

int main()

{

Essay essay;

double contentPoints;

double spellingPoints;

double lengthPoints;

double grammerPoints;

cout<<"Please give content points(Max 30): ";

cin>>contentPoints;

cout<<"Please give spelling points(Max 20): ";

cin>>spellingPoints;

cout<<"Please give length points(Max 20): ";

cin>>lengthPoints;

cout<<"Please give grammer points(Max 30): ";

cin>>grammerPoints;

essay.setContentPoints(contentPoints);

essay.setGrammerPoints(grammerPoints);

essay.setLengthPoints(lengthPoints);

essay.setSpellingPoints(spellingPoints);

cout<<"Your grade is:"<<essay.getLetterGrade()<<endl;

system("PAUSE");

return 0;

}

------------

graded.h

// Specification file for the GradedActivity class
#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; }

GradedActivity(double s)
{ score = s; }

// Mutator function
void setScore(double s)
{ score = s;}

// Accessor functions
double getScore() const
{ return score; }

char getLetterGrade() const;
};

#endif

---------

essay.h

---------

#ifndef ESSAY_H

#define ESSAY_H

#include "GradedActivity.h"

class Essay: public GradedActivity

{

private:

double grammerPoints;

double spellingPoints;

double lengthPoints;

double contentPoints;

public:

Essay(){

grammerPoints=0.0;

spellingPoints=0.0;

lengthPoints=0.0;

contentPoints=0.0;

}

void setGrammerPoints(double);

void setSpellingPoints(double);

void setLengthPoints(double);

void setContentPoints(double);

double getGrammerPoints()const {return grammerPoints;}

double getSpellingPoints()const {return spellingPoints;}

double getLengthPoints()const {return lengthPoints;}

double getContentPoints()const {return contentPoints;}

virtual char getLetterGrade();

};

#endif

-----------

essay.cpp

// Implementation file for the GradedActivity class

#include "essay.h"

//Implementing mutator functions

void Essay::setGrammerPoints(double points){

grammerPoints=points;

}

void Essay::setSpellingPoints(double points){

spellingPoints=points;

}

void Essay::setLengthPoints(double points){

lengthPoints=points;

}

void Essay::setContentPoints(double points){

contentPoints=points;

}

// implementing getLetterGrade() vitual function.

//This function needs to be modified as will be explained in your class.

// We have implemented this as it should be

//comment if you need upgradation and provide material for this function

char Essay::getLetterGrade(){

char letterGrade;

int score=grammerPoints+spellingPoints+lengthPoints+contentPoints;

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;

}

---------

output :

Please give content points (Max 30: 25 Please give spelling points (Max 20): 15 Please give length points (Max 20) 15 lease give grammer points (Max 3): 25 Your grade is:B Press any key to continue . . .