Question

1. C++ program that will ask the user for how many test scores will be entered.
2. Setup a while loop with this loop iteration parameter. The data will include the student’s first name and midterm score
3. Print out the completed test scores to a file (midTermScores.txt) .
4. Print out list of students names and grades
5. in the print out, a letter grade should replace numeric score using standard grading (a = 90 – 100, b=80-90, c=70-80, d=60-70, f=below 60)

Answer 1

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

int main(){
        
        int nscores;
        
        cout << "Number of Test scores : ";
        cin >> nscores;
        
        string fnames[nscores];
        float scores[nscores];
        
        int i=0;
        
        // Reading first names and test scores
        while( i < nscores ) {
                cout << "Enter First Name : ";
                cin >> fnames[i];
                cout << "Enter Score : ";
                cin >> scores[i];
                i++;
        }
        
        i = 0;
        
        // printing names and test scores
        cout << "--------------------------------"<<endl;
        
        cout << "Name"<<"\t"<<"Score" << endl;
        
        while( i < nscores ) {
                cout << fnames[i] <<"\t"<< scores[i] <<endl;
                i++;
        }
        
        cout << "--------------------------------"<<endl;
        
        
        int j = 0;
        
        ofstream fs;
        
        //clearing file with empty text
        fs.open("midTermScores.txt");
        fs << "";
        fs.close();
        
        fs.open("midTermScores.txt", ios::app);
        
        // writing first name and scores on file
        while( j < nscores ) {
                fs << fnames[j] <<"\t"<< scores[j] <<endl;
                j++;
        }
        
        // closing file
        fs.close();
        
        
        int k = 0;
        
        // printing firstnames and grades
        cout << "Name"<<"\t"<<"Grade" << endl;
        while( k < nscores ) {
                
                int n = scores[k];
                char grade;
                if( n >= 90 && n <= 100 ){
                        grade = 'A';
                }else if(n >= 80 && n < 90){
                        grade = 'B';
                }else if(n >= 70 && n < 80){
                        grade = 'C';
                }else if(n >= 60 && n < 70){
                        grade = 'D';
                }else{
                        grade = 'F';
                }
                cout << fnames[k] << "\t" << grade <<endl;
                k++;
        }
        
        return 1;
}

Output: