lab2_3(C++)

#include <iostream>
#include <fstream>
using namespace std;
string getSource(string what) {
    cout << "Select the source for " + what + ":\n1:Console\n2:File\nEnter 1 or 2: ";
    string choice;
    cin >> choice;
    while ((choice != "1") && (choice != "2")) {
        cout << "Incorrect input!!! Select the source for " + what + ":\n1:Console\n2:File\nEnter 1 or 2: ";
        cin >> choice;
    }
    return choice;
}
string getInPath() {
    string path;
    bool isIncorrect;
    cout << "Enter file path: ";
    do
    {
        isIncorrect = true;
        cin >> path;
        ifstream fin(path);
        if (fin.is_open()) {
            isIncorrect = false;
            fin.close();
        }
        else {
            cout << "File is not found\nEnter file path: ";
        }
        if (!isIncorrect && ((path.length() < 4) || (!(path.substr(path.length() - 4) == ".txt")))) {
            cout << "File is found, but it is not \".txt\" type file\nEnter file path : ";
            isIncorrect = true;
        }
    } while (isIncorrect);
    return path;
}
string getOutPath() {
    string path;
    bool isIncorrect;
    cout << "Enter file path: ";
    do
    {
        isIncorrect = false;
        cin >> path;
        if ((path.length() < 4) || (!(path.substr(path.length() - 4) == ".txt"))) {
            cout << "It should be a \".txt\" file\nEnter file path: ";
            isIncorrect = true;
        }
    } while (isIncorrect);
    return path;
}
int getNumberFromConsole() {
    bool isIncorrect;
    int number = 0;
    cout << "Enter number: ";
    bool isInсorrect;
    do
    {
        isInсorrect = false;
        cin >> number;
        if (!cin.good())
        {
            isInсorrect = true;
            cout << "Incorrect input!!!\nEnter number: ";
            while (cin.get() != '\n') {
                cin.clear();
            }
        }
        if ((!isInсorrect) && (number < 1))
        {
            isInсorrect = true;
            cout << "The number must be more than 0\nEnter number: ";
        }
    } while (isInсorrect);
    return number;
}
int getNumberFromFile(string path) {
    ifstream fin(path);
    int number;
    fin >> number;
    if (!fin.eof()) {
        cout << "Incorrect file content!!!\n";
        number = 0;
    }
    else {
        if (number < 1) {
            cout << "Incorrect file content!!!(The number must be more than 0)\n";
            number = 0;
        }
    }
    fin.close();
    return number;
}
int getNumber(string source) {
    int number;
    string InPath;
    if (source == "1") {
        number = getNumberFromConsole();
    }
    else {
        InPath = getInPath();
        number = getNumberFromFile(InPath);
        while (number == 0) {
            InPath = getInPath();
            number = getNumberFromFile(InPath);
        }
    }
    return number;
}
int getReverse(int number) {
    int reverse = 0;
    while (number > 0) {
        reverse = reverse * 10 + number % 10;
        number /= 10;
    }
    return reverse;
}
string getAnswer(int number) {
    string answer;
    if (number == getReverse(number)) {
        answer = "Number is palindrome";
    }
    else {
        answer = "Number isn't palindrome";
    }
    return answer;
}
void outputToFile(string path, string answer) {
    ofstream fout;
    fout.open(path);
    fout << answer;
    fout.close();
    cout << "Comlete!";
}
void output(string source, string answer) {
    string outPath;
    if (source == "1") {
        cout << answer;
    }
    else {
        outPath = getOutPath();
        outputToFile(outPath, answer);
    }
}
int main() {
    cout << "Welcome to the program that checks is a given number a palindrome.\n";
    string inputSource = getSource("entering the number");
    int number = getNumber(inputSource);
    string answer = getAnswer(number);
    string outputSource = getSource("output");
    output(outputSource, answer);
}