Thread: cant break loop without ending program

Double nested loop, first writes grades to a text file and second reads grades from the text and averages, I cant get the break right too finish the program I have tried for 2 days now. any ideas?

Code:

#include <iostream>
#include <fstream>


using namespace std;

int main()
{

    int x, studentID, grade1, grade2, grade3, grade4;
    int score, total;
    char again = 'Y';

    ofstream file;
    file.open("grade.txt");

    while ( total == 0)
    {
    for (x = 0; x < 1; x++)
    {
        
    //enter grades
    cout << "Enter student ID#:" << endl;
    cin >> studentID;
    cout << "Enter grade: " << endl;
    cin >> grade1;
    if (grade1 <0 || grade1 > 100)
    {
        cout << "0 - 100 only! Enter again: " << endl;
        cin >> grade1;
    }
    else if (grade1 <= 0 || grade1 >= 100)
    {
        cout << endl;
    }
    cout << "Enter grade: " << endl;
    cin >> grade2;
        if (grade2 <0 || grade2 > 100)
    {
        cout << "0 - 100 only! Enter again: " << endl;
        cin >> grade2;
    }
    else if (grade2 <= 0 || grade2 >= 100)
    {
        cout << endl;
    }
    cout << "Enter grade: " << endl;
    cin >> grade3;
        if (grade3 <0 || grade3 > 100)
    {
        cout << "0 - 100 only! Enter again: " << endl;
        cin >> grade3;
    }
    else if (grade3 <= 0 || grade3 >= 100)
    {
        cout << endl;
    }
    cout << "Enter grade: " << endl;
    cin >> grade4;
        if (grade4 <0 || grade4 > 100)
    {
        cout << "0 - 100 only! Enter again: " << endl;
        cin >> grade4;
    }
    else if (grade4 <= 0 || grade4 >= 100)
    {
        cout << endl;
    }
    
 
    //file imput
    file << studentID << " " << grade1 << " " << grade2 << " " << grade3 << " " << grade4 << endl;
    }
   
    //exit or not
    cout << "Do you want to enter another?" << endl;
    cin >> again;
    if ( again == 'Y' || again == 'y' )
    {
        cout << "OK lets continue" << endl << endl;
    }
    else if ( again == 'N' || again == 'n' ) 
    {
        break;
    }

    }//while loop ends

    total = 0;
    
    while ( 400 < score)
    {
        for (x = 0; x < 0; x++)
        {
         score = grade1 + grade2 + grade3 + grade4;   
         ifstream file ("grade.txt");
         file >> score;
         cout << "Average is: " << score / 4 << endl;
         
        }
    }
    
    return 0;
 
}

First off, you need to improve the indentation a little (especially your nested loops)
https://en.wikipedia.org/wiki/Indent_style

Second, start using some functions.
A development process
Putting the two major loops into two separate functions will allow you to make much more sense of the program flow (and pave the way for future enhancements).
Massive main() functions containing everything are just too confusing.

Code:

    int score, total;
    char again = 'Y';
 
    ofstream file;
    file.open("grade.txt");
 
    while ( total == 0)

Q: What value is total initialised to, before comparing it with zero?

You are not allowed to delete threads since the questions posted here are archived so that people facing similar problems can benefit from the knowledge posted here.

Instead of using Break, you could simply make the condition keeping the loop going to the opposite.

Code:

bool bloop = 1;
while (bloop)
{
    for (int i = 0; i < 6; i++)
    {
        // Break out of the loops
        i = 6;
        bloop = 0;
    }
}