#include <iostream>
#include <cstdlib>
#include <fstream>
#include <ctime>
#include <string>
using namespace std;
const int TRIES = 5;
int letterFill(char, string, string&);
int main()
{
    string name;
    char letter;
    int num_of_wrong_guesses = 0;
    string word;
    string line;
    ifstream myfilе("words.txt");
    int n = rand() % 600000;
    if (myfilе.is_open())
    {
        int index = 0;
        while (getline(myfilе, line))
        {
            if (index++ == n) {
                word = line;
                break;
            }
        }

        myfilе.close();
    }
    else cout<< "Unable to open file";
    //choose and copy a word from array of words randomly
    // Initialize the secret word with the * character.
    string unknown(word.length(), '*');
    // welcome the user
    cout<< "\n\nWelcome to hangman!! Guess the word";
    cout<< "\n\nYou have to type only one letter in one try.";
    cout<< "\n\nYou have " << TRIES << " tries to try and guess the word.";
    cout<< "\n*****************************************";
    // Loop until the guesses are used up
    while (num_of_wrong_guesses< TRIES)
    {
        cout<< "\n\n" << unknown;
        cout<< "\n\nGuess a letter: ";
        cin>> letter;
        if (letterFill(letter, word, unknown) == 0)
        {
            cout<<endl<< "Whoops! That letter isn't in there!" <<endl;
            num_of_wrong_guesses++;
        }
        else
        {
            cout<<endl<< "You found a letter!" <<endl;
        }
        // Tell user how many guesses has left.
        cout<< "You have " << TRIES - num_of_wrong_guesses;
        cout<< " guesses left." <<endl;
        // Check if user guessed the word.
        if (word == unknown)
        {
            cout<< word <<endl;
            cout<< "Yeah! You got it!";
            break;x
        }
    }
    if (num_of_wrong_guesses == TRIES)
    {
        cout<< "\nSorry, you lose." <<endl;
        cout<< "The word was : " << word <<endl;
    }
    cin.ignore();
    cin.get();

    return 0;
}
int letterFill(char guess, string secretword, string &guessword)
{
    int i;
    int matches = 0;
    int len = secretword.length();
    for (i = 0; i<len; i++)
    {
        if (guess == guessword[i])
            return 0;
        if (guess == secretword[i])
        {
            guessword[i] = guess;
            matches++;
        }
    }
    return matches;
}