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Bubble sort not working

One Pea (49)
The 'bubbleSort' function is meant to sort all the rows in the 'studentRecords' 2D array. However, it only sorts the 1st and 3rd rows.

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#include <iostream>
#include <cstdlib>
#include <ctime>
#include <cmath>

using namespace std;

class Functions
{
    private:

        int menuChoice=0;
        int studentRecords[4][5];
        int studentID=0;
        int x=0;

    public:

        void arrayFill ()
        {
            studentRecords[0][0]=1;
            studentRecords[1][0]=2;
            studentRecords[2][0]=3;
            studentRecords[3][0]=4;
            //srand(time(0));

            for (int j=0;j<5;j++)
            {
                for (int i=1;i<5;i++)
                {
                    studentRecords[j][i]=(rand()%100)+1;
                }
            }
        }

        void viewAllRecords ()
        {
            cout << "| ID | Quiz 1 | Quiz 2 | Midterm | Final |" << endl;

            for (int j=0;j<4;j++)
            {
                for (int i=0;i<5;i++)
                {
                    cout << "   " << studentRecords[j][i] << "\t";
                }

                cout << endl;
            }

            cout << endl;
            menu();
        }

        void idSearch ()
        {
            cout << "Enter the student ID: ";
            cin >> studentID;
            cout << endl;
            cout << "| ID | Quiz 1 | Quiz 2 | Midterm | Final |" << endl;

            switch (studentID)
            {
                case 1:
                    for (int j=0;j<5;j++)
                    {
                        cout << "   " << studentRecords[0][j] << "\t";
                    }
                    break;

                case 2:
                    for (int j=0;j<5;j++)
                    {
                        cout << "   " << studentRecords[1][j] << "\t";
                    }
                    break;

                case 3:
                    for (int j=0;j<5;j++)
                    {
                        cout << "   " << studentRecords[2][j] << "\t";
                    }
                    break;

                case 4:
                    for (int j=0;j<5;j++)
                    {
                        cout << "   " << studentRecords[3][j] << "\t";
                    }
                    break;

            }

            cout << endl << endl;
            menu();
        }

        void bubbleSort ()
        {
            for (int j=0;j<4;j++)
            {
                for (int i=1;i<4;i++)
                {
                    if (studentRecords[j][i] < studentRecords[j][i+1])
                    {
                        x=studentRecords[j][i];
                        studentRecords[j][i]=studentRecords[j][i+1];
                        studentRecords[j][i+1]=x;
                    }
                }
            }



            cout << "| ID | Quiz 1 | Quiz 2 | Midterm | Final |" << endl;

            for (int j=0;j<4;j++)
            {
                for (int i=0;i<5;i++)
                {
                    cout << "   " << studentRecords[j][i] << "\t";
                }

                cout << endl;
            }

            cout << endl;
            menu();



        }

        void menu ()
        {
            cout << "1. View all student records" << endl;
            cout << "2. View individual student record" << endl;
            cout << "3. Show highest and lowest final scores" << endl << endl;
            cout << "Enter the number of the menu option you want to proceed with: ";
            cin >> menuChoice;
            cout << endl;

            while (menuChoice!=4)
            {
                switch (menuChoice)
                {
                    case 1:
                        viewAllRecords();
                        break;

                    case 2:
                        idSearch();
                        break;

                    case 3:
                        bubbleSort();
                        break;



                }

            }
        }
};

int main()
{
    Functions program;
    program.arrayFill();
    program.menu();


    return 0;
}
tpb (1495)
You need yet another loop outside of the usual double loop for bubble sort. The outermost loop would go through the row (leftmost) index values. The two inner loop indices are for the bubble sort on the current row.
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