PL3v21

#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <regex>
#include <streambuf>
#include <Windows.h>

HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE); //Console address to change text color

/*
Printing color messages in console
Usage: print_str(sring_you_want_to_print, color_of_text, time_between_letters);
Colors: https://i.stack.imgur.com/ZG625.png
*/
inline bool print_str(std::string str, int k, int n)
{
    SetConsoleTextAttribute(hConsole, k);
    for (int l = 0; l < int(str.size()); l++)
    {
        std::cout << str[l];
        Sleep(n);
    }
    SetConsoleTextAttribute(hConsole, 14);
    return true;
}

/*
 * Searches words for current assignment
 */
void word_search(std::string& input, std::vector<std::string>& vec)
{
    int count[32];
    memset(count, 0, sizeof count);
    std::string word = "";
    bool err = false, correct = false;
    for (unsigned int i = 0; i < input.length(); i++)
    {
        word.push_back(input[i]);
        if (strchr("аоуыиеёэюяАОУЫИЕЁЭЮЯ", input[i]) && ++count[input[i] & 31] > 1)
            correct = true;
        if ((input[i] == ' ' || input[i] == '\n' || i+1 == input.length()) && correct)
        {
            if (!err)
            {
                word.pop_back();
                vec.push_back(word);
            }
            memset(count, 0, sizeof count);
            correct = false;
            word = "";
            err = false;
        }
        if (!(input[i] >= 'а' && input[i] <= 'я' || input[i] >= 'А' && input[i] <= 'Я'))
            err = true;
        if (input[i] == ' ' && !correct)
        {
            memset(count, 0, sizeof count);
            correct = false;
            word = "";
            err = false;
        }
    }
}

/*
* Read function, reads from given path/.../file
* Usage: read(vec_you_want_to_fill)
* Now automatically reads everything and fills linked string to further work
*/
void read(std::string& file)
{
    std::ifstream in;
    std::string file_path;
    print_str("Write file name or path to it: ", 10, 10);
    do {
        getline(std::cin, file_path);
        if (file_path.length() > 256)
        {
            print_str("You wrote too long file path and i ", 4, 10);
            file_path = "";
        }
        in.open(file_path);
    } while (!in.is_open() && print_str("Couldn't read the file, type again: ", 4, 10));
    file.assign((std::istreambuf_iterator<char>(in)),
        std::istreambuf_iterator<char>());
    in.close();
}

int main()
{
    setlocale(LC_ALL, "Russian");
    std::vector<std::string> words;
    std::string file;
    read(file);
    print_str("Content in file: \"", 11, 5);
    std::cout << file;
    std::ofstream out("out.txt");
    word_search(file, words);
    print_str("\"\nCorrect words: {", 11, 5);
    out << "Correct words: {";
    for (int i = 0; i < words.size(); i++)
    {
        std::cout << ' ' << words[i]; out << ' ' << words[i] << ',';
        print_str(",", 11, 5);
    }
    out << "}";
    out.close();
    print_str("\b }\n\nData was written in file in: \"C:\\Users\\Mike\\source\\repos\\ProgLang3 v21\\ProgLang3 v21\\ out.txt\"", 13, 5);
    print_str("\nPress enter to continue. . .", 7, 5);
    getchar();
    return 0;
}