从“常量字符*”到“字符”类错误的转换无效

invalid conversion from ‘const char*’ to ‘char’ Class Error

本文关键字：字符 错误 无效 转换 常量字符 常量      更新时间：2023-10-16

>我有一个类，我不知道如何解决.cc文件中的错误进行编译

执行.h文件以在.h文件中显示板

    class sudokuboard {
 private:
  /*** Member data ***/
  char board[9][9];

.cc 文件部分给我带来麻烦

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]’

我不知道该改变什么了。 我尝试了很多不同的方法。

问题是 C 样式数组没有get方法。最简单的解决方案是使用 board[r][c] 访问变量。但我建议使用 c++ 容器。

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

或者，如果你想更进一步，你可以使 Matrix 成为一个类，这样你就可以实现自己的get，并set函数采用x和y坐标。

相关文章：