Question

please help me fix the error in here

#include<iostream>
#include <string>
using namespace std;

string getStudentName();
double getNumberExams();
double getScoresAndCalculateTotal(double E);
double calculateAverage(double n, double t);
char determineLetterGrade();
void  displayAverageGrade();

int main()
{
    string StudentName;
    double NumberExam, Average, ScoresAndCalculateTotal;
    char LetterGrade;
    StudentName = getStudentName();
    NumberExam = getNumberExams();
    ScoresAndCalculateTotal= getScoresAndCalculateTotal(NumberExam);
    Average = calculateAverage(NumberExam, ScoresAndCalculateTotal);

    return 0;
}

string getStudentName()
{
    string StudentName;
    cout << "\n\nEnter Student Name:";
    getline(cin, StudentName);

    return StudentName;
}

double getNumberExams()
{
    double NumberExam;
    cout << "\n\n Enter number of Exams :";
    cin >> NumberExam;

    return NumberExam;
}

double getScoresAndCalculateTotal(double E)
{
    int NumberExam;
    double exam;
    double total
do

        {
            for (int counter = 1; counter <= NumberExam; counter = counter + 1)
            {
                do
                {
                    cout << "Enter exam " << counter << " score: ";
                    cin >> exam;
                    total = total + exam;
                }
            }
        }while ()
    double calculateAverage(double n, double t)
    {
        double NumberExam, total, Average;
        return Average = total / NumberExam;
    }
    char determineLetterGrade()
    {
        double Average;
        char determineLetterGrade;
        if (average >= 89.5)
            cout << "You earned an A" << endl << endl;
        else if (average >= 79.5)
            cout << "You earned a B" << endl << endl;
        else if (average >= 69.5)
            cout << "You earned a C" << endl << endl;
        else if (average >= 59.5)
            cout << "You earned a D" << endl << endl;
        else
            cout << "You earned an F" << endl << endl;

        total = 0;



    }
    void  displayAverageGrade()
    {
        cout << "\n\nStudent Name: " << student_name << endl;
        cout << "Total of Exams: " << total << endl << endl << endl;
        cout << "Average: " << average << endl << endl << endl;

    }
}

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new c++ program with name "main.cpp" is created, which contains following code.

main.cpp :

//header files
#include<iostream>
#include <string>
using namespace std;
//function prototypes
string getStudentName();
double getNumberExams();
double getScoresAndCalculateTotal(double);
double calculateAverage(double, double);
char determineLetterGrade(double);
void displayAverageGrade(string,double,double,char);
//main method
int main()
{
//declaring variables
string StudentName;
double NumberExam=0, Average=0, ScoresAndCalculateTotal=0;
char LetterGrade;
//getting student name
StudentName = getStudentName();
//getting number of exams
NumberExam = getNumberExams();
//getting total and calculate sum
ScoresAndCalculateTotal= getScoresAndCalculateTotal(NumberExam);
//calling method to find average
Average = calculateAverage(ScoresAndCalculateTotal,NumberExam);
//calling method to find grade
LetterGrade=determineLetterGrade(Average);
//displaying details
displayAverageGrade(StudentName,ScoresAndCalculateTotal,Average,LetterGrade);
return 0;
}
//method defination
string getStudentName()
{
string StudentName;
//asking to enter student name
cout << "Enter Student Name:";
getline(cin, StudentName);
//return name
return StudentName;
}
//method to get number of exams
double getNumberExams()
{
double NumberExam;
cout << "Enter number of Exams :";
cin >> NumberExam;
//return number of exams
return NumberExam;
}
double getScoresAndCalculateTotal(double NumberExam)
{
double exam=0;
double total=0;
for (int counter = 1; counter <= NumberExam; counter = counter + 1)
{
cout << "Enter exam " << counter << " score: ";
cin >> exam;
total = total + exam;
}
return total;
}
//calculate average
double calculateAverage(double total, double NumberExam)
{
double average=total/NumberExam;
return average;//return average
}
//method to determine grade
char determineLetterGrade(double average)
{
char determineLetterGrade;
if (average >= 89.5)
determineLetterGrade='A';
else if (average >= 79.5 && average < 89.5)
determineLetterGrade='B';
else if (average >= 69.5 && average < 79.5)
determineLetterGrade='C';
else if (average >= 59.5 && average < 69.5)
determineLetterGrade='CD';
else
determineLetterGrade='F';

return determineLetterGrade;//return
}
//display details
void displayAverageGrade(string student_name,double total,double average,char LetterGrade)
{ cout<<"========================================================="<<endl;
cout << "Student Name: " << student_name << endl;
cout << "Total of Exams: " << total << endl;
cout << "Average: " << average << endl;
cout << "Letter Grade: " << LetterGrade<<endl;

}

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

Output : Compile and Run above program and will get the screen as shown below

Screen 1 :Screen asking Student Name , Number of Exams and Exam score

Screen 2 :Screen displaying details

Screen 3 :Screen showing details

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.