Code needs to be in C++ and a .cpp attachment

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Design an Essay class that is derived from the GradedActivity class :

 

class GradedActivity{

private :

double score;

public:

GradedActivity()

{score = 0.0;}

GradedActivity(double s)

{score = s;}

void setScore(double s)

{score = s;}

double getScore() const

{return score;}

 

char getLetterGrade() const;

};

 

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;

}

 

The Essay class should determine the grade a student receives on an essay. The student's essay score can be up to 100, and is made up of four parts:

 

• Grammar: up to 30 points
• Spelling: up to 20 points
• Correct length: up to 20 points
• Content: up to 30 points

 

 

The Essay class should have a double member variable for each of these sections, as well as a mutator that sets the values of these variables . It should add all of these values to get the student's total score on an Essay.

 

Demonstrate your class in a program that prompts the user to input points received for grammar, spelling, length, and content, and then prints the numeric and letter grade received by the student.