從'const char *'到'char'的無效轉換類錯誤

Question

我有一個課程，而且我不知道如何解決.cc文件中的錯誤以進行編譯

.h文件的摘錄以顯示.h文件中的板

    class sudokuboard {

 private:

  /*** Member data ***/

  char board[9][9];

.cc文件部件給我帶來麻煩

sudokuboard::sudokuboard()
{
  for (size_t r = 0; r < 9; r++){
    for (size_t c = 0; c < 9; c++)
        board[r][c] = '_';
  }
}

void sudokuboard::print() const
// write the board to cout
{
    for (size_t r = 0; r < 9; r++){
        string colStr = "";
        for (size_t c = 0; c < 9; c++){
            colStr += board.get(r, c);
        }
        cout << colStr << endl;
    }

void sudokuboard::remove(size_t r, size_t c)
// remove the numeral at position (r,c)
{
    board[r][c] = "_";
}

ERRORS:
sudokuboard.cc: In member function ‘void sudokuboard::print() const’:      
sudokuboard.cc:26: error: request for member ‘get’ in ‘((const 
sudokuboard*)this)->sudokuboard::board’, which is of non-class type
‘const char [9][9]’
sudokuboard.cc: In member function ‘void sudokuboard::remove(size_t, 
size_t)’:
sudokuboard.cc:42: error: invalid conversion from ‘const char*’ to ‘char’
sudokuboard.cc:59: error: request for member ‘get’ in ‘((const 
sudokuboard*)this)->sudokuboard::board’, which is of non-class type ‘const
char [9][9]’

我不知道該更改什么了。 我嘗試了很多不同的方法。

Answer 1

問題是C樣式數組沒有get方法。 最簡單的解決方案是使用board[r][c]訪問變量。 但是我建議使用c ++容器。

using Row = std::vector<char>;
using Matrix = std::vector<Row>;

Matrix board;

或者，如果您想更進一步，則可以將Matrix set一個類，以便可以使用x和y坐標實現自己的get和set函數。