Hangman游戏(C++)

#include
#include
#include
#include
#include
#include

using namespace std;
int main()
{
//setup
const int MAX_WRONG = 8; //maximum number of incorrect guesses allowed

vector words; //collection of possible words to guess
words.push_back("GUESS");
words.push_back("HANGMAN");
words.push_back("DIFFICULT");

srand(time(0));
random_shuffle(words.begin(), words.end());
const string THE_WORD = words[0];
//word to guess
int wrong = 0;
//number of incorrect guesses
string soFar(THE_WORD.size(), '-'); //word guessed so far
string used = "";
//letters already guessed

cout << "Welcome to Hangman. Good luck!\n";
//main loop
while ((wrong < MAX_WRONG) && (soFar != THE_WORD))
{
cout << "\n\nYou have " << (MAX_WRONG - wrong) << " incorrect guesses left.\n";
cout << "\nYou've used the following letters:\n" << used << endl;
cout << "\nSo far, the word is:\n" << soFar << endl;
char guess;
cout << "\n\nEnter your guess: ";
cin >> guess;
guess= toupper(guess); //make uppercase since secret word in uppercase
while (used.find(guess) != string::npos)
{
cout << "\nYou've already guessed " << guess << endl;
cout << "Enter your guess: ";
cin >> guess;
guess = toupper(guess);
}

used += guess;

if (THE_WORD.find(guess) != string::npos)
{
cout << "That's right! " << guess << " is in the word.\n";

//update soFar to include newly guessed letter
for (int i = 0; i < THE_WORD.length(); ++i)
if (THE_WORD[i] == guess)
soFar[i] = guess;
}
else
{
cout << "Sorry, " << guess << " isn't in the word.\n";
++wrong;
}
}
//shut down
if (wrong == MAX_WRONG)
cout << "\nYou've been hanged!";
else
cout << "\nYou guessed it!";

cout << "\nThe word was " << THE_WORD << endl;

return 0;
}