#include <iostream>
#include <stdio.h>
#include <time.h>
using namespace std;

char toUpper(char c) {
    return (c >= 'a' && c <= 'z' ? 'A' + c - 'a' : c);
}//end of toUpper

bool contains(char str[], char c) {
    int i = 0;
    while (str[i] != 0) {
        if (str[i] == c)
            return true;
        i++;
    }//end of while
    return false;
}//end of contains

int main() {
    srand(time(0));
    char words[10][11] = { "ABC","BAD","CAT","DAD","FREE","GREAT","HAPPY","ISLAND","JACK" };
    int pickedWord = rand() % 10;
    cout << words[pickedWord] << endl;
    char usedLetters[26] = {};
    char c;
    int attemps = 0;
    while (attemps < 10) {
        if (attemps == 5) {
            int i = 0;
            int missingLetters = 0;
            int userMissed = 0;
            while (words[pickedWord][i]) {
                char letterInWord = words[pickedWord][i];
                if (usedLetters[letterInWord - 'A'] != 1)
                    userMissed++;
                i++;
            }//end of while
            cout << "There are " << userMissed << " letters left in the word.\n";
        }//end of if
        cout << "Enter a letter:";
        cin >> c;
        c = toUpper(c);
        if (usedLetters[c - 'A'] == 1) {
            cout << "You've already tried letter " << c << endl;
            continue;
        }//end of if
        else
            usedLetters[c - 'A'] = 1;
        if (contains(words[pickedWord], c)) {
            cout << "Letter " << c << " is correct!\n";
            bool win = true;
            int i = 0;
            while (words[pickedWord][i]) {
                char letterInWord = words[pickedWord][i];
                if (usedLetters[letterInWord - 'A'] != 1) {
                    win = false;
                    break;
                }//end of if
                i++;
            }//end of while
            if (win) {
                cout << "You've won with only " << attemps << " wrong answer! The word was " << words[pickedWord] << endl;
                return 0;
            }//end of if
        }//end of if
        else {
            attemps++;
            cout << "Incorrect! You have " << 10 - attemps << " tries left!\n";
        }//end of else
    }//end of while
    cout << "You lose! The word was " << words[pickedWord] << "!\n";
    return 0;
}//end of main