matlab求解数独流程图,简单的数独游戏求解程序(matlab)
时间: 2023-10-31 12:07:27 浏览: 55
以下是MATLAB求解数独的简单流程图:
1. 读入数独题目,将空格处的数字设为0;
2. 从左到右,从上到下扫描整个数独,对每个空格进行以下操作:
- 判断该空格可能填哪些数字;
- 如果可能填的数字只有一个,则填入该空格;
- 如果可能填的数字有多个,则进行回溯;
3. 回溯的过程如下:
- 找到上一个空格;
- 如果该空格已经填过数字,则清空该空格,重新寻找上一个空格;
- 如果该空格还未填数字,则将数字填入该空格,回到第2步。
以下是一个简单的MATLAB数独求解程序:
```
function [solution, flag] = sudoku_solver(puzzle)
% puzzle: 9x9 integer array representing the sudoku puzzle, 0 for blank
% solution: 9x9 integer array representing the solved sudoku puzzle
% flag: 0 for unsolvable, 1 for solvable
% Initialization
solution = puzzle;
flag = 1;
% Check input
if numel(puzzle) ~= 81
error('Invalid puzzle size!');
end
% Solve puzzle
[row, col] = find(solution == 0);
n = length(row);
i = 1;
while i <= n
% Check if the puzzle is solvable
if i == 1 && isempty(find(solution == 0, 1))
return;
end
% Get the possible numbers for the current cell
possible_numbers = setdiff(1:9, [solution(row(i), :), solution(:, col(i))', ...
solution(3*floor((row(i)-1)/3)+1:3*floor((row(i)-1)/3)+3, ...
3*floor((col(i)-1)/3)+1:3*floor((col(i)-1)/3)+3)]);
% Fill in the cell if there is only one possible number
if length(possible_numbers) == 1
solution(row(i), col(i)) = possible_numbers;
i = i + 1;
else % Backtracking
if solution(row(i), col(i)) ~= 0
solution(row(i), col(i)) = 0;
end
i = i - 1;
end
% Check if the puzzle is unsolvable
if i == 0
flag = 0;
return;
end
end
end
```
该程序通过遍历数独中的每个空格来解决数独,实现了一个简单的回溯算法。
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