lab 2.3 c++

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int choiceCheck() {
    int choice;
    bool isIncorrect;
    do {
        isIncorrect = true;
        cin >> choice;
        if (cin.fail() || (cin.get() != '\n')) {
            cout << "Error! Input a number" << endl;
            cin.clear();
            while (cin.get() != '\n');
        } else {
            cin.clear();
            if (choice > 0 && choice < 3) {
                isIncorrect = false;
            } else {
                cout << "Error! Input 1 or 2" << endl;
            }
        }

    } while (isIncorrect);
    return choice;
}

int inputCheck() {
    bool isIncorrect;
    int n;
    cout << "Input n" << endl;
    do {

        isIncorrect = true;
        cin >> n;
        if (cin.fail() || (cin.get() != '\n')) {
            cout << "Error! Input a number" << endl;
            cin.clear();
            while (cin.get() != '\n');
        } else {
            cin.clear();
            if (n > 0) {
                isIncorrect = false;
            } else {
                cout << "Error! Input a number greater than 0" << endl;
            }
        }

    } while (isIncorrect);
    return n;
}

int **inputCheckMatrix(int n, int **matr) {
    int n1, i, j;
    bool isIncorrect;
    n1 = n + 1;
    for (j = 0; j < n; j++) {
        matr[0][j] = 0;
    }
    for (j = 0; j < n; j++) {
        matr[n1][j] = 0;
    }
    for (i = 1; i < n1; i++) {
        for (j = 0; j < n; j++) {
            do {
                isIncorrect = true;
                cin >> matr[i][j];
                if (cin.fail() || (cin.get() != '\n')) {
                    cout << "Error! Input a number" << endl;
                    cin.clear();
                    while (cin.get() != '\n');
                } else {
                    isIncorrect = false;
                }
            } while (isIncorrect);
        }
    }
    return matr;
}

string checkInputFilePath() {
    string path;
    bool isInCorrect;
    do {
        cout << "Input path to the file:\n";
        isInCorrect = false;
        cin >> path;
        ifstream fin(path);
        if (!fin.is_open()) {
            cout << "Could not open the file" << endl;
            isInCorrect = true;
        } else {
            fin.close();
        }

    } while (isInCorrect);
    return path;
}


int **fileCheckMatrix(int &n, int **matr) {
    string path;
    bool isIncorrect;
    int i, j, n1, n2;
    do {
        path = checkInputFilePath();
        ifstream fin(path);
        isIncorrect = false;
        fin >> n;
        if (fin.fail()) {
            cout << "The data is incorrect" << endl;
            isIncorrect = true;
        }
        if (!isIncorrect && (n < 1)) {
            cout << "The data is incorrect" << endl;
            isIncorrect = true;
        }
        if (!isIncorrect) {
            n1 = n + 1;
            n2 = n + 2;
            matr = new int *[n + 2];
            for (i = 0; i < n2; i++) {
                matr[i] = new int[n];
            }
            for (j = 0; j < n; j++) {
                matr[0][j] = 0;
            }
            for (j = 0; j < n; j++) {
                matr[n1][j] = 0;
            }
            for (i = 1; i < n1; i++) {
                for (j = 0; j < n; j++) {
                    fin >> matr[i][j];
                    if (fin.fail()) {
                        cout << "The data is incorrect" << endl;
                        isIncorrect = true;
                    }
                }
            }
            if (!fin.eof()) {
                cout << "The data is incorrect" << endl;
                isIncorrect = true;
            }
        }
        fin.close();
    } while (isIncorrect);
    return matr;
}


int **inputChoice(int &n) {
    int choice, n2, i;
    int **matr;
    cout << "Choose input option:\n1.Input through console\n2.Input through file" << endl;
    choice = choiceCheck();
    if (choice == 1) {
        n = inputCheck();
        n2 = n + 2;
        matr = new int *[n2];
        for (i = 0; i < n2; i++) {
            matr[i] = new int[n];
        }
        matr = inputCheckMatrix(n, matr);
    } else {
        matr = fileCheckMatrix(n, matr);
    }
    return matr;
}

void swap(int &n, int **matr) {
    int n1, i, j;
    int helpArray1[n];
    int helpArray2[n];
    n1 = n + 2;
    for (j = 0; j < n; j++) {
        helpArray1[j] = matr[1][j];
        matr[1][j] = 0;
    }
    for (i = 2; i < n1; i++) {
        for (j = 0; j < n; j++) {
            helpArray2[j] = matr[i][j];
            matr[i][j] = helpArray1[j];
            helpArray1[j] = helpArray2[j];
        }
    }
}

string checkOutputFilePath() {
    string path;
    bool isIncorrect;
    cout
            << "Input file path and the name of the file for\nexample С:\\Projects\\Number\\FileName.txt. If the\nfile does not exist, then it will be created\nautomatically in the root folder of the program:\n";
    isIncorrect = false;
    cin >> path;
    ifstream fin(path);
    if (!fin.is_open()) {
        cout << "Could not open the file or it does not exist" << endl;
        isIncorrect = true;
    } else {
        fin.close();
    }
    if (isIncorrect) {
        cout << "File will be created in the root folder of the program\n";
        path = "Result.txt";
    }
    return path;
}

void outputMatrix(int n, int **matr) {
    int i, j, n1;
    n1 = n + 2;
    for (i = 0; i < n1; i++) {
        for (j = 0; j < n; j++) {
            cout << matr[i][j] << " ";
        }
        cout << endl;
    }
}

void outputFile(int n, int **matr) {
    string path;
    int i, j, n1;
    path = checkOutputFilePath();
    ofstream fout(path);
    n1 = n + 2;
    for (i = 0; i < n1; i++) {
        for (j = 0; j < n; j++) {
            fout << matr[i][j] << " ";
        }
        fout << endl;
    }
    fout.close();
}

void outputChoice(int &n, int **matr) {
    int choice;
    cout << "Choose output option:\n1.Output through console\n2.Output through file" << endl;
    choice = choiceCheck();
    if (choice == 1) {
        outputMatrix(n, matr);
    } else {
        outputFile(n, matr);
    }
}


int main() {
    int **matr;
    int n;
    matr = inputChoice(n);
    swap(n, matr);
    outputChoice(n, matr);
    return 0;
}