Question

In C++

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.

Answer 1

Thanks for the question.

Below is the code you will be needing Let me know if you have any doubts or if you need anything to change.

Thank You !

===========================================================================

#include<iostream>
using namespace std;

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;
}

class Essay:public GradedActivity{
  
   private:
       double grammar;
       double spelling;
       double length;
       double content;
      
   public:
       Essay(): GradedActivity(0){
          
       }
       Essay(double gr, double sp, double le, double con):GradedActivity(gr+sp+le+con),
       grammar(gr), spelling(sp), length(le), content(con){
          
       }
       void setGrammar(double score){
           grammar=score;
           GradedActivity::setScore(grammar+spelling+length+content);
       }
       void setSpelling(double score){
           spelling=score;
           GradedActivity::setScore(grammar+spelling+length+content);
       }
       void setLength(double score){
           length=score;
           GradedActivity::setScore(grammar+spelling+length+content);
       }
       void setContent(double score){
           content=score;
           GradedActivity::setScore(grammar+spelling+length+content);
       }
  
};

int main(){
  
   Essay essay = Essay(15,10,10,10);
  
   cout<<"Total Score: "<<essay.getScore()<<", Letter Grade: "<<essay.getLetterGrade()<<endl;
   essay.setGrammar(30);
   essay.setLength(20);
   essay.setContent(30);
   cout<<"Total Score: "<<essay.getScore()<<", Letter Grade: "<<essay.getLetterGrade()<<endl;
  
}

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C:\Users\User\Documents\Untitled5.cpp - [Executing] - Dev-C++ 5.11 File Edit Search View Project Execute Tools AStyle Window Help TDM-GCC 4.9.2 64-bit Release (globals) Untitled5.cpp 34 else f letterGrade = 'F'; } return letterGrade 35 C:Users\User\DocumentsUntitled5.exe 36 Total Score: 45, Letter Grade: F Total Score: 90, Letter Grade: A 37 38 39 E class Essay: public GradedActivity{ 40 private: double grammar double spelling; double length; double content; 41 Process exited after 0.01062 seconds with return value 0 Press any key to continue 42 43 44 45 46 public: Essay() GradedActivity (0) { 47 48F 49 50 } Essay(double gr, double sp, double le, double con):GradedActivity(gr+sp+ grammar (gr), spelling(sp), length(le), content(con){ 51 52 53 } void setGrammar (double score) 54 55E 56 grammar score; setScore(grammar+spelling+length+content); } void setSpelling(double score){ spelling=score; setScore(grammar+spelling+length+content) 57 58 59 60 61 HCompiler Resources dh Compile Log Debug Find Results Close Errors: 0 Warnings o Output Filename: C:\Users\User\Documents\Untitled5.exe Abort Compilation Output Size: 1.83531l093597412 MiB Compilation Time: 1.86s