编写c++语言实现人机猜拳游戏

编写一个C++语言的人机猜拳游戏通常包括以下步骤：

1. 定义基本的游戏元素：创建三个选项表示“石头”、“剪刀”和“布”，分别对应英文的rock、scissors和paper。

enum class Guess { Rock, Scissors, Paper };

2. 定义计算机随机选择的功能：你可以使用`rand()`函数结合数组索引来模拟随机选择。

Guess computerChoice() {
    srand(time(0)); // 初始化随机数种子
    return static_cast<Guess>(rand() % 3);
}

3. 主循环：接受用户的输入，并与电脑的选择进行比较，输出结果。

void playGame() {
    cout << "请输入你的选择（R for rock, S for scissors, P for paper）：" << endl;
    string userChoice;
    cin >> userChoice;

    Guess user = (userChoice == "R" ? Guess::Rock : (userChoice == "S" ? Guess::Scissors : Guess::Paper));
    Guess computer = computerChoice();

    if (user == computer) {
        cout << "平局！";
    } else if (isWinningMove(user, computer)) {
        cout << "你赢了！Computer选择了" << guessToString(computer) << ")";
    } else {
        cout << "你输了！Computer选择了" << guessToString(computer) << ")";
    }
}

bool isWinningMove(Guess player, Guess opponent) {
    switch (player) {
        case Guess::Rock: return opponent == Guess::Paper;
        case Guess::Scissors: return opponent == Guess::Rock;
        case Guess::Paper: return opponent == Guess::Scissors;
    }
}

4. 辅助函数：将枚举值转换成字符串便于打印。

string guessToString(Guess guess) {
    switch (guess) {
        case Guess::Rock: return "rock";
        case Guess::Scissors: return "scissors";
        case Guess::Paper: return "paper";
    }
}

5. 游戏结束后的提示或循环选项。

完整的程序可以包含一个main函数来运行整个游戏流程，用户可以选择是否继续玩下去。

int main() {
    bool playAgain = true;
    while (playAgain) {
        playGame();
        cout << "是否再玩一局？(Y/N): ";
        char response;
        cin >> response;
        if (response != 'Y' && response != 'y') {
            playAgain = false;
        }
    }
    return 0;
}