Question

我无法找到我的错误是我的代码。我试图创建一个＆＃34;董事会＆＃34;用X和Y作为坐标绘制一些东西。问题是我想要绘制的字符不止一次出现。这是代码：

class Board
{
public:

    void fillBoard()
    {
        for (int i = 0; i < 22; i++)
        {
            for (int k = 0; k < 78; k++)
            {
                board[i][k] = ' ';
            }
        }
    }

    void drawBoard()
    {
        for (int i = 0; i < 22; i++)
        {
            for (int k = 0; k < 78; k++)
            {
                cout<<board[i][k];
            }
            cout<<"\n";
        }
    }

    void addView(int width, int height, char img, int tallness = 0)
    {
        /// board[height][width] = img;
        for (int i = 0; i <= tallness; i++, height++)
        {
            board[height][width] = img;
        }
    }

private:
   char board[78][22];
};


int main()
{
    Board board;
    board.fillBoard();

    ///board.addView(x, y, 'O');
    board.addView(0, 10, '|', 5); 
    board.drawBoard();

    return 0;
}

如您所见，划桨出现了4次。我希望它在给定的坐标处只出现一次。我的错是什么？

Answer 1

Steve Cox已经指出你正在向后索引数组。这样：

for (int i = 0; i < 22; i++)
{
    for (int k = 0; k < 78; k++)
    {
        board[i][k] = ' ';
    }
}

可以在数组board[22][78]上运行，但是您声明board[78][22]

C ++ 2D阵列乒乓板

1 个答案: