Reading input from text file C++

Question

I'm suffering a problem when trying to read test scores from a text file I entered earlier in my program. The problem is it says my variables are undefined but I think I have them defined. The writing part of the program using "ofstream" worked perfectly and gave me the output formatted in a text file.

1001 21 22 23 24 
1002 25 26 27 28 
1003 29 30 31 32 

My goal has the following guidelines: 2. Read the data from your file. a. Use nested loops. b. The outer loop will be a “while” loop and the inner loop will be a “for” loop (4 quizzes).

Here's my code below. Hopefully someone can see where I'm going wrong and point me in the right direction:

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

int main()
{
    int numStudents, numTests = 4, studentCount = 1, count = 1, test = 1, score = 0, testCount = 1, 
    int stuID;
    double average;
    double total;
    ofstream outputFile;
    ifstream inputFile;

    cout << fixed << setprecision(2);

    //Open file scores.txt
    outputFile.open("Scores.txt");

    //Get the number of students
    cout << "How many students? ";
    cin >> numStudents;


    while (studentCount <= 3)
    {
        cout << "Enter Student ID: ";
        cin >> stuID;
        outputFile << stuID << " ";

        for (test = 1; test <= numTests; test++)
        {

            cout << "Enter grade for quiz " << test << ": ";
            cin >> score;
            outputFile << score << " ";
        }
        outputFile << endl;
        studentCount++;

    }

        outputFile.close(); //closes Output File

        inputFile.open("Scores.txt"); //opens Output File


    while (studentCount <= 3)
        {

        for (test = 1; test <= numTests; test++)
        {
            inputFile >> score;
            total += score;
        }

        average = total / numTests;
        inputFile >> stuID;
        cout << "The average for student " << stuID << " is " << average << endl;

        studentCount++;
        }

    inputFile.close(); //closes Input File





    system("pause");
    return 0;
}

Thanks for taking the time to help me by looking at this.

Answer 1

You are making a very trivial mistake:-

You first while loop is:-

while (studentCount <= 3)

After this your second while loop is

while (studentCount <= 3) 

Since studentCount is already 4 it won't enter into this loop.

You need to re-initialise studentCount for second loop :-

studentCount = 1;
while (studentCount <= 3)