c++ - 宾果游戏板 : Generating unique values

Question

我在生成不重复此宾果游戏板的唯一值时遇到问题。我的代码相对简单:我使用嵌套的 for 循环通过一些打印语句生成值；在每次嵌套迭代时，我检查生成的值是否存在于数组中。如果存在则返回true，生成的值选择一个新的随机数。我认为通过在每次迭代时启动 srand() 并将循环中的计数用作其种子，我将能够实现这一点。不幸的是，这似乎不太可能。

这是如何实现的？

我的代码:

#define MAX 100
#define MIN 1

using std::vector;

bool Board::checkValues(unsigned int array[], unsigned int valueToCheck)
{
    int len = sizeof(array) / sizeof(int);

    bool numberExists = false;

    static int repeatCount = 0;

    for(int i = 1; i < len; i++)
    {
        if (valueToCheck == array[i])
        {
            numberExists = true;
            repeatCount++;
            break;
        }
    }

    return numberExists;
}

Board::Board(unsigned int numberOfRows, unsigned int numberOfColumns)
{
    this->numRows = numberOfRows;
    this->numColumns = numberOfColumns;

    for (int i = 0; i < this->numRows; i++)
    {
        this->board.push_back(vector<unsigned int>(this->numColumns, 0));
    }

    this->valuesVisited[numberOfRows * numberOfColumns];
}

void Board::generate()
{
    int repeatCount = 0;

    for(int i = 0; i < this->numRows; i++)
    {
        bool atMid = false;

        if (i == this->numRows / 2 - 1)
        {
            atMid = true;
        }

        for(int j = 0; j < this->numColumns; j++)
        {
            if (atMid && j == this->numColumns / 2 - 1)
            {
                printf(" Free ");
                continue;
            }

            int seed = (i + 1) * (j + 1);

            unsigned int randNumber = generateRand(MIN, MAX, seed);

            bool numberExists = checkValues(this->valuesVisited, randNumber);

            if (numberExists)
            {
                //int equation = (randNumber % 10) + (i * j) / (randNumber + randNumber);

                randNumber = generateRand(MIN, MAX, seed) - (i * j);
                repeatCount++;
            }

            this->valuesVisited[(i + 1) * (j + 1)] = randNumber;

            this->board[i][j] = randNumber;

            printf(" %d ", board[i][j]);
        }

        std::cout << "\n\n";
    }

    printf("You have %d repeats", repeatCount);
}

Answer 1

考虑用候选数字填充 std::vector，然后对其执行 std::random_shuffle 并取第一个 N。