"CSudoku: 实现数独游戏及随机生成，人工指定数独"

CSudoku class is a class designed to implement the classic game of Sudoku. It includes various functions for generating, displaying, resolving, and analyzing Sudoku puzzles. The class contains a 9x9 array to represent the game board, as well as variables for tracking the number of blank spaces on the board, the difficulty level of the puzzle, and the number of solutions found. The class includes a check function to validate the input of a new number into the game board, as well as a depth-first search (dfs) function for resolving the puzzle. The resolve function utilizes the dfs algorithm to find all solutions to the Sudoku puzzle, and the analyze function offers further insight into the puzzle, such as the number of solutions and various solving techniques that can be applied. The SudokuGenerator function is utilized to randomly generate a new Sudoku puzzle, with the level of difficulty determined by the input parameter. Additionally, there is an overloaded version of SudokuGenerator that allows for the manual input of a specific Sudoku puzzle. The display function is used to visually present the current state of the Sudoku puzzle, making it easier for the player to interact and engage with the game. Overall, the CSudoku class provides a comprehensive and functional implementation of the Sudoku game, offering a wide range of features for both generating and solving puzzles.