public 成员函数无法使用私人成员数据

Question

我有下面的代码。

当我有 main 运行() 函数时运行 ResetTrackingTable() 函数。 ResetTrackingTable() 为 my_n_rows 和 my_n_cols 调用 0，而不是访问存储在私有成员数据中的现有号码。

这是为什么？它似乎正在创建函数的新实例...


public:

    WordGame();


    void Run(Board &gameBoard, Trie &library, int wordlengthlim);

    void CheckNode(int row, int col, Board & gameBoard, Trie &Library);

    void ExitNode();
    void ResetTrackingTable(int rows, int cols); 

    void PrintWordList();



private:
    std::vector<std::string> my_WordList;
    int my_wordlength; 
    int my_wordlengthlimit;
    std::stringstream currentword; 

    int my_n_cols;
    int my_n_rows;

    std::vector<std::vector<bool>> my_TrackingTable;
};



void WordGame::Run(Board & gameBoard, Trie &Library, int wordlengthlim)
{

    //std::stringstream word;
    //std::string tempword;
    //word.str("");

    currentword.str(""); //Clear current word

    int my_wordlengthlimit = wordlengthlim; //Import limit word length
    int my_wordlength = 0; //Set current word length

    int my_n_rows = gameBoard.numRows(); //Import number of rows
    int my_n_cols = gameBoard.numCols(); //Import number of cols

    for (int i_row = 0; i_row < my_n_rows; ++i_row)
    {
        for (int i_col = 0; i_col < my_n_cols; ++i_col)
        {
            //Actually, when should it be reset?
            this->ResetTrackingTable(); //Initialize the tracking table as all false before each new starting char. 

            CheckNode(i_row, i_col,gameBoard,Library); //Check each beginning node. 
        }
    }
}

void WordGame::ResetTrackingTable()
{

    for (int i_row = 0; i_row < my_n_rows; ++i_row)
    {
        my_TrackingTable.push_back(std::vector<bool> {false});

        for (int i_col = 1; i_col < my_n_cols; ++i_col)
        {
            my_TrackingTable[i_row].push_back(false);  //Initialize the tracking table as all false.
        }
    }

}

Answer 1

这些代码行：

int my_n_rows = gameBoard.numRows(); //Import number of rows
int my_n_cols = gameBoard.numCols(); //Import number of cols

正在 Run 函数内声明新变量。

如果您想引用成员变量，请删除 int 声明符：

my_n_rows = gameBoard.numRows(); //Import number of rows
my_n_cols = gameBoard.numCols(); //Import number of cols

您需要对所有要使用的成员变量执行此操作。

此外，您的声明：

void ResetTrackingTable(int rows, int cols);

不符合其定义：

void WordGame::ResetTrackingTable() { // ...

您需要具有相同数量的相同类型的参数。

public 成员函数无法使用私人成员数据

private member data not being available to public member function

c++

member-functions