Question

(C++) I need to alter the code below to fit the given requirements. You will need to move the calculations to a function. A second function to return the Letter Grade. You will need to define a namespace to contain the CONST. Also, need to define an enum for letter grades: A, B, C, D, and F.

Console

Student Grade Calculation Form

First Name: Larry

Last Name: Hobbs

Homework Average: 65

Midterm Grade: 90

Final Exam Grade: 75

Student: Larry Hobbs

Completed the course with a final grade of: 72.5 or C

Progressing Complete!!!!!

Specifications

• Define a namespace to include the CONST and enum for grades.
• enum scoreLetter {A,B,C,D,F};
• Move the calculations to value return function
• You will need a second function to determine the Course Grade.
• This function should return an enum type
• You will need to use the following Functional Prototype. This is also the direction your functions should be designed.

//Functional Prototypes

double final_Score(double hwAvg, double mtScore,

double feScore, char &ltrGrade);

myNamespace::scoreLetter score_Letter(int score);

• Notice the final_Score function is a value return with a reference parameter
• See Additional Functions below
• The final_Score function should call the score_Letter

• #include <fstream>
  #include <iostream>
  #include <iomanip>
  #include <cstring>
  #include <cstdlib>
  #include <ctime>
  #include <vector>
  using namespace std;

  
  int main() {
  //Declaring variables
  const double HW = 0.55;
  const double MID=0.20;
  const double FINAL=0.25;
  string first,last;
  double homeWork,midTerm,finalExam,finalGrade;

  cout<<"Enter full name :";
  cin>>first>>last;

  while(true)
  {
  cout<<"Enter home work score :";
  cin>>homeWork;
  if(homeWork<0 || homeWork>100)
  {
  cout<<"** Invalid.Must be between 0-100 **"<<endl;
  }
  else
  break;
  }

  while(true)
  {
  cout<<"Enter mid term Score :";
  cin>>midTerm;
  if(midTerm<0 || midTerm>100)
  {
  cout<<"** Invalid.Must be between 0-100 **"<<endl;
  }
  else
  break;
  }

  while(true)
  {
  cout<<"Enter final exam score :";
  cin>>finalExam;
  if(finalExam<0 || finalExam>100)
  {
  cout<<"** Invalid.Must be between 0-100 **"<<endl;
  }
  else
  break;
  }

  finalGrade=(HW*homeWork)+(midTerm*MID)+(FINAL*finalExam);
  
  cout<<"\nName :"<<first<<" "<<last<<endl;
  cout<<"Home Work score :"<<homeWork<<endl;
  cout<<"Mid Term Score :"<<midTerm<<endl;
  cout<<"Final Exam Score :"<<finalExam<<endl;
  cout<<"Final Grade :"<<finalGrade<<endl;

    
  return 0;
  }

Answer 1

Program code to copy:-

#include <fstream>
#include <iostream>
#include <iomanip>
#include <cstring>
#include <cstdlib>
#include <ctime>
#include <vector>
using namespace std;

namespace myNamespace
{
   //Declaring constants
   const double HW = 0.55;
   const double MID=0.20;
   const double FINAL=0.25;
   //Declare enum for grades
   enum scoreLetter{A,B,C,D,F};
}

//Functional Prototypes
double final_Score(double hwAvg,double mtScore,double feScore, char &ltrGrade);
myNamespace::scoreLetter score_Letter(int score);

int main() {

   string first,last;
   double homeWork,midTerm,finalExam,finalGrade;
   char letterGrade;

   cout << "Student Grade Calculation Form" << endl;
   cout<<"First Name : ";
   cin>>first;
   cout<<"Last Name : ";
   cin>>last;

   while(true)
   {
       cout<<"Homework Average: ";
       cin>>homeWork;
       if(homeWork<0 || homeWork>100)
       {
           cout<<"** Invalid.Must be between 0-100 **"<<endl;
       }
       else
           break;
   }  

   while(true)
   {  
       cout<<"Midterm Grade: ";
       cin>>midTerm;
       if(midTerm<0 || midTerm>100)
       {
           cout<<"** Invalid.Must be between 0-100 **"<<endl;
       }
       else
           break;
   }

   while(true)
   {  
       cout<<"Final Exam Grade: ";
       cin>>finalExam;
       if(finalExam<0 || finalExam>100)
       {
           cout<<"** Invalid.Must be between 0-100 **"<<endl;
       }
       else
           break;
   }

   //Calling function to calculate final score and letter grade
   finalGrade = final_Score(homeWork,midTerm,finalExam,letterGrade);

   //Printing result
   cout<<"\nStudent: "<<first<<" "<<last<<endl;
   cout<<"Completed the course with a final grade of: "<<finalGrade<<" or "<<letterGrade << endl;
   cout<<"Progressing Complete!!!!!"<<endl;
  
   return 0;
}

//Function to calculate final score and letter grade
//Function is a value return with a reference parameter
double final_Score(double hwAvg,double mtScore,double feScore, char &ltrGrade)
{
   double finalGrade;
  
   //Calculating final score
   finalGrade = (myNamespace::HW*hwAvg)+(mtScore*myNamespace::MID)+(myNamespace::FINAL*feScore);
   //Calling function to get the score letter
   myNamespace::scoreLetter letter = score_Letter(finalGrade);
   //Converting enum letter grade to char
   for(int i=0; i<5; i++)
   {
       if(letter==i)
           ltrGrade = 'A' + i;
   }
                  
   return finalGrade;
}

//Function to determine the score letter
myNamespace::scoreLetter score_Letter(int score)
{
   myNamespace::scoreLetter letter;
   if(score>=90)
       letter = myNamespace::A;
   else
       if(score>=80)
           letter = myNamespace::B;
       else
           if(score>=70)
               letter = myNamespace::C;
           else
               if(score>=60)
                   letter = myNamespace::D;
               else
                   letter = myNamespace::F;   
                  
   return letter;
}

Screenshot of output:-