Hogwarts needs a program to calculate their students’ grades. Wizardry can only

Question

Hogwarts needs a program to calculate their students’ grades. Wizardry can only do so much, and the supernatural task of grading is beyond their magical abilities.

I want you to create a program that will grade the students’ test scores and give a final average. You will read the data from an input file and write the results to an output file.

Copy the following three lines and paste them into your input file named student_data.txt. Your program will read in this data. The format for each line of the file is as follows : (student’s name, year, grade 1, grade 2, grade 3)

Harry 1 80 70 60

Draco 2 95 90 100

Luna 3 60 75 55

Calculate the average (your average should be a floating point value) and print everything to a file named averages.txt. Print “Data written to averages.txt.” to the console.

Correct Console Output:

Data written to averages.txt

Explanation / Answer

//main.cpp

#include <fstream>
#include <iostream>

using namespace std;

int main()
{
ifstream fin;
fin.open("student_data.txt");

ofstream fout;
fout.open("averages.txt");
fout << "Name Year Average";

string name;
float year, gr1, gr2, gr3, avg;

for (int x=0; x<3; x++){
fin >> name >> year >> gr1 >> gr2 >> gr3;
avg = (gr1+gr2+gr3)/3.0;

fout << " " << name << " " << year << " " << avg;
}

cout << "Data written to averages.txt";

fin.close();
fout.close();
return 0;
}

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