lab3_1(C++)

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <string>

using namespace std;

char takeSource() {
    char choice;
    cin >> choice;
    while ((choice != '1') && (choice != '2')) {
        while (cin.get() != '\n') {
            cin.clear();
        }
        cout << "Incorrect input!!!\nSelect the source:\n1:Console\n2:File\nEnter 1 or 2: ";
        cin >> choice;
    }
    return choice;
}

string takeInPath() {
    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 takeOutPath() {
    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;
}

string takeSentenceFromFile(const string path) {
    ifstream fin(path);
    string sentence;
    getline(fin, sentence);
    if (!fin.eof()) {
        sentence = "";
    }
    fin.close();
    return sentence;
}

string takeSentenceFromConsole() {
    string sentence;
    string temp;
    cout << "Enter the sentence: ";
    getline(cin, temp);
    getline(cin, sentence);
    return sentence;
}

string takeSentence (const char source) {
    string inPath;
    string sentence;
    if (source == '1') {
        sentence = takeSentenceFromConsole();
    }
    else {
        inPath = takeInPath();
        sentence = takeSentenceFromFile(inPath);
        if (sentence == "") {
            inPath = takeInPath();
            sentence = takeSentenceFromFile(inPath);
        }
    }
    return sentence;
}

string replaceAllToSpace(string sentence, char symbol) {
    int index = sentence.find(symbol);
    while (index != -1) {
        sentence.replace(index, 1, " ");
        index = sentence.find(symbol);
    }
    return sentence;
}

string makeSentenceNormal(string sentence) {
    sentence = replaceAllToSpace(sentence, '.');
    sentence = replaceAllToSpace(sentence, ',');
    sentence = replaceAllToSpace(sentence, '-');
    sentence = replaceAllToSpace(sentence, ';');
    sentence = replaceAllToSpace(sentence, '!');
    sentence = replaceAllToSpace(sentence, '?');
    sentence = replaceAllToSpace(sentence, ':');
    sentence = replaceAllToSpace(sentence, '—');
    return sentence;
}

vector <string> findArrayOfWords(string sentence) {
    sentence = makeSentenceNormal(sentence);
    vector <string> arrayOfWords(100);
    int wordsCounter = 0;
    string word;
    int index = sentence.find(" ");
    while (index != -1) {
        word = sentence.substr(0, index);
        if (word != "") {
            arrayOfWords[wordsCounter] = word;
            wordsCounter++;
        }
        sentence = sentence.substr(index + 1);
        index = sentence.find(" ");
    }
    if (sentence != "") {
        arrayOfWords[wordsCounter] = sentence;
        wordsCounter++;
    }
    vector <string> totalArrayOfWords(wordsCounter);
    for (int i = 0; i < wordsCounter; i++) {
        totalArrayOfWords[i] = arrayOfWords[i];
    }
    return totalArrayOfWords;
}

bool areWordsSame(string word, string lastWord){
    transform(word.begin(), word.end(), word.begin(), tolower);
    transform(lastWord.begin(), lastWord.end(), lastWord.begin(), tolower);
    if (word == lastWord) {
        return true;
    }
    else {
        return false;
    }
}

int findAnswer(vector <string> array) {
    int counter = 0;
    for (int i = 0; i < array.size(); i++) {
        if (areWordsSame(array[i], array[array.size() - 1])){
            counter++;
        }
    }
    return counter;
}

void outputToFile(const string path, const string sentence, const int answer) {
    ofstream fout;
    fout.open(path);
    fout << "Sentence is:\n" << sentence << "\nLast word founded " << answer << " times.";
    fout.close();
    cout << "Done";
}

void output(const char source, const string sentence, const int answer) {
    string outPath;
    if (source == '1') {
        cout << "Sentence is:\n" << sentence << "\nLast word founded " << answer << " times.";

    }
    else {
        outPath = takeOutPath();
        outputToFile(outPath, sentence, answer);
    }
}

int main(){
    cout << "Welcome to the program that count how many times the last word occurs in a sentence.\nSelect the source for entering the sentence:\n1:Console\n2:File\nEnter 1 or 2: ";
    char inputSource = takeSource();
    string sentence = takeSentence(inputSource);
    vector <string> arrayOfWords = findArrayOfWords(sentence);
    int answer = findAnswer(arrayOfWords);
    cout << "Select the source for output:\n1:Console\n2:File\nEnter 1 or 2: ";
    char outputSource = takeSource();
    output(outputSource, sentence, answer);
}