找到一个问题，const int N = 15;但是还是20pts
by chentianyi0109 @ 2023-09-10 08:55:11
```cpp
printf ("%3d%c", a[i][j], j == n ? '\n' : ' ');
```
改成
```cpp
printf ("%3d", a[i][j]);
if(j==n) printf("\n");
```
by like_tis_yzx @ 2023-09-29 21:49:41
不需要输出空格
by like_tis_yzx @ 2023-09-29 21:50:10