C++ Format Create a program to handle a college class\'s information and grades:

Question

C++ Format

Create a program to handle a college class's information and grades:

Capture the Teacher's name

Capture the Class designation

The program should ask how many students are in the class and do the following for each student:

Read the students name

Read a maximum of 10 grades for the student (from 0 - 100 is acceptable. If outside the range don't use the input, ask for a correction , 999 should stop input of grades if there are less than 10 to enter)

Calculate the average of the student's grades

Compute the student's grade as a letter grade

For the entire class

Compute the class's grade average

Determine how many A's, B's, C's, D's and F's are in the class.

Write the output data to a file called class_statistics.txt

Teacher: Bob Marley
Class: CGS1010
Student Name: Jim Beam Average: 88 Grade: B
Donna Jenner 95 A
Student count: 2
Student average: 91.5
A's: 1
B's: 1
C's: 0
D's: 0
F's: 0

Need to use this Code

#include <iostream>
#include <fstream>
#include <iomanip>

using namespace std;

void printFileToScreen();

int main()
{
//close the input file here
printFileToScreen();
return 0;
}

void printFileToScreen()
{
ifstream inData;
string line = "";
inData.open("class_statistics.txt");
while(inData)
{
getline(inData,line);
cout << line << endl;
}
inData.close();
}

Explanation / Answer

#include <iostream>
#include <fstream>
#include <string>
#include <cmath>
#include <iomanip>
using namespace std;
//function prototype
char getGrade(double avg);
int main()
{

   //declare variables to read from user
   char teacherName[40];
   char className[40];
   char studentName[40];
   int numStudents;
   int marks=0;

   double totalMarks=0;
   double avg=0;
   bool repeat=true;

   int gradeA=0;
   int gradeB=0;
   int gradeC=0;
   int gradeD=0;
   int gradeF=0;

   string fileName="class_statistics.txt";

   ofstream fout;
   fout.open(fileName);

   cout<<"Enter teacher's name :";
   gets(teacherName);

   cout<<"Enter class name :";
   gets(className);

   fout<<"Teacher: "<<teacherName<<endl;
   fout<<"Class: "<<className<<endl;

   cout<<"Enter number of students ";
   cin>>numStudents;

   cin.ignore();

   for(int index=0;index<numStudents;index++)
   {

       cout<<"Enter student name : ";
       gets(studentName);

       fout<<"Student Name:"<<studentName<<endl;

       int grade;
       int count=0;
       //read ten grades
       for(grade=0;grade<10 && repeat;grade++)
       {

           do
           {
               cout<<"Enter grade "<<(grade+1)<<" marks or 999 to stop: ";
               cin>>marks;

               if(marks==999)
                   repeat=false;

           }while((marks<0 || marks>100) && repeat);

           if(marks!=999)
           {
               count++;
               //add marks to totalMarks
               totalMarks+=marks;
           }
       }

       cin.ignore();
       //calculate average
       avg=totalMarks/count;
      
       //write average to file
       fout<<"Average : "<<setprecision(4)<<avg<<endl;
       char gradeLetter=getGrade(avg);
       //write grade to file
       fout<<"Grade: "<<getGrade(avg)<<endl;

       //count grades of each letter
       if(gradeLetter=='A')
           gradeA++;
       else if(gradeLetter=='B')
           gradeB++;
       else if(gradeLetter=='C')
           gradeC++;
       else if(gradeLetter=='D')
           gradeD++;
       else if(gradeLetter=='F')
           gradeF++;

       //reset
       totalMarks=0;
       avg=0;
       repeat=true;
   }

   //print grades
   fout<<"A's"<<gradeA<<endl;
   fout<<"B's"<<gradeB<<endl;
   fout<<"C's"<<gradeC<<endl;
   fout<<"D's"<<gradeD<<endl;
   fout<<"F's"<<gradeF<<endl;

   //close file
   fout.close();

   system("pause");
   return 0;
}

//Returns character grade
char getGrade(double avg)
{
   char grade=' ';
   if(avg>=90)
       grade='A';
   else if(avg>=80 && avg<90)
       grade='B';
   else if(avg>=70 && avg<80)
       grade='C';
   else if(avg>=60 && avg<70)
       grade='D';
   else
       grade='F';

   return grade;
}

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