c++ - 数组c++中的随机数据丢失

Question

这是我的问题....在下面的代码中，在 char guess[4] 和 cin >> guess 我的 answer 之间索引 0 处的元素消失了。谁知道为什么？

while(bullCount != 4)
{
    //Create the answer
    char answer[4];

    for(int loops = 0; loops < 4; loops++)
    {
        answer[loops] = createAnswerDigit(seed);
    }

    //Reset bullCount and cowCount from previous loop
    bullCount = 0;
    cowCount = 0;

    cout << "Enter your guess [1000-9999]: ";

    //Guess by player
    char guess[4];

    cout << "Answer[0]: " << answer[0] << "\n"; //Prints "Answer[0]: 4

    //Retrieve guess by player
    cin >> guess;

    cout << "Answer[0]: " << answer[0] << "\n" //Prints "Answer[0]: "

    for(int digitLoc = 3; digitLoc >= 0; digitLoc--)
    {
        //Do check backwards to prevent mistaking bulls for cows
        int check = checkGuess(guess[digitLoc], digitLoc, answer);

        if(check == cow)
        {
            cowCount++;
        }

        else if(check == bull)
        {
            bullCount++;
        }
    }
}

Answer 1

guess 的大小为 4，但是，您输入了一个介于 1000 - 9999 之间的数字，即 4 > 字符长。请记住，在一个字符串中，字符串的末尾必须有一个\0，所以guess少了1个字符。这可能会覆盖 answer 的第一个元素。尝试让 guess 大小为 5，或者更好的是，改用 std::string。