C++实现Hangmen游戏

此代码来源于《C++ Primer Plus》

#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
#include <cctype>

using std:: string;
const int NUM = 26;
const string wordList[NUM] = {"apiary", "beetle", "cereal", "danger", "ensign", "florid", "garage", "health",
                              "insult", "jackal", "keeper", "loaner", "manage", "nonce", "onset", "plaid",
                              "quilt", "remote", "stolid", "train", "useful", "valid", "whence", "xenon", "yearn", "zippy"};

int main() {
    using std::cout;
    using std::cin;
    using std::tolower;
    using std::endl;
    std::srand(std::time(0));
    char play;
    cout << "Will you play a word game? <y/n> ";
    cin >> play;
    play = tolower(play);
    while (play == 'y') {
        string target = wordList[std::rand() % NUM];
        int length = target.length();
        string attempt(length, '-');
        string badChars;
        int guesses = 6;
        cout << "Guess my secret word. It has " << length << " letters, and you guess\n" << "one letter at a time. You get " << guesses << " wrong guesses.\n";
        cout << "Your word: " << attempt << endl;
        while (guesses > 0 && attempt != target) {
            char letter;
            cout << "Guess a letter: ";
            cin >> letter;
            if (badChars.find(letter) != string::npos || attempt.find(letter) != string::npos) {
                cout << "You already guessed that. Try again.\n";
                continue;
            }
            int loc = target.find(letter);
            if (loc == string::npos) {
                cout << "Oh, bad guess!\n";
                --guesses;
                badChars += letter;
            } else {
                cout << "Good guess!\n";
                attempt[loc] = letter;
                loc = target.find(letter, loc + 1);
                while (loc != string::npos) {
                    attempt[loc] = letter;
                    loc = target.find(letter, loc + 1);
                }
            }
            cout << "Your word: " << attempt << endl;
            if ( attempt != target) {
                if (badChars.length() > 0)
                    cout << "Bad choices: " << badChars << endl;
                cout << guesses << " bad guesses left\n";
            }
        }
        if (guesses > 0)
            cout << "That's right!\n";
        else
            cout << "Sorry, the word is " << target << ".\n";
        cout << "Will you play another? <y/n>";
        cin >> play;
        play = tolower(play);
    }
    cout << "Bye\n";
    return 0;
}

Output:

Will you play a word game? <y/n>Y
 Guess my secret word. It has 5 letters, and you guess
one letter at a time. You get 6 wrong guesses.
Your word: -----
Guess a letter:e
 Good guess!
Your word: -e---
6 bad guesses left
Guess a letter:a
 Good guess!
Your word: -ea--
6 bad guesses left
Guess a letter:t
 Oh, bad guess!
Your word: -ea--
Bad choices: t
5 bad guesses left
Guess a letter:r
 Good guess!
Your word: -ear-
Bad choices: t
5 bad guesses left
Guess a letter:p
 Oh, bad guess!
Your word: -ear-
Bad choices: tp
4 bad guesses left
Guess a letter:y
 Good guess!
Your word: year-
Bad choices: tp
4 bad guesses left
Guess a letter:s
 Oh, bad guess!
Your word: year-
Bad choices: tps
3 bad guesses left
Guess a letter:d
 Oh, bad guess!
Your word: year-
Bad choices: tpsd
2 bad guesses left
Guess a letter:n
 Good guess!
Your word: yearn
That's right!
Will you play another? <y/n>n
Bye