C语言使用递归算法实现Sudoku Solver算法(附完整源码)

sudoku 结构体定义

struct sudoku
{
   
    
    
    uint8_t *a; /**< matrix as a flattened 1D row-major array */
    uint8_t N;  /**< number of elements */
    uint8_t N2; /**< block of elements */
};

实现以下接口