C++ Array College Assignment

#include <iostream>;
#include <fstream>;
#include <string>;
#include <regex>;

using namespace std;

int main() {

    string line;
    string s;
    ifstream myfile;
    ofstream myfile2;
    string data[2][2];
    vector<string> str_result;
    int a = 0;
    int b = 0;

    myfile.open("D:\\Dev\\Projects\\Project1\\assignment2.txt");
    if (myfile.is_open())
    {
        // read file
        cout << "Reading from File" << endl;
        while (getline(myfile, line))
        {
            cout << line << '\n';
        }
        myfile.close();

        // tokening with regex
        regex reg("\\s+");
        sregex_token_iterator iter(line.begin(), line.end(), reg, -1);
        sregex_token_iterator end;

        vector<string> vec(iter, end);

        // assigning value to array
        for (auto v : vec)
        {
            data[a][b] = v;
            b++;
            if (b > 1) {
                b = 0;
                a++;
            }
        }

        // first display
        cout << endl;
        cout << "First Display" << endl;
        for (int x = 0; x < 2; x++) {
            for (int y = 0; y < 2; y++) {
                cout << data[x][y] << ' ';
                if (y == 1) {
                    cout << endl;
                }
            }
        }

        myfile2.open("D:\\Dev\\Projects\\Project1\\swap.txt");

        // second display
        cout << endl;
        cout << "Second Display" << endl;
        for (int x = 0; x < 2; x++) {
            for (int y = 1; y >= 0; y--) {
                cout << data[x][y] << ' ';
                myfile2 << data[x][y] << ' ';
                if (y == 0) {
                    cout << endl;
                    myfile2 << endl;

                }
            }
        }

        myfile2.close();

    } else {
        cout << "Unable to open file\n";
    }

    cin.get();

    return 0;
}