找到原因了 ```cpp int fx[4]={1,-1,0,1}; int fy[4]={0,0,1,-1}; ``` 应为 ```cpp int fx[4]={1,-1,0,0}; int fy[4]={0,0,1,-1}; ``` by sjy_2023 @ 2024-03-21 17:18:04