上边代码块怎么挂了
```cpp
int row=i;
//接下来为了减小误差，找系数最大的一行
for(int j=i+1;j<=n;++j){
if(fabs(a[row][i])<fabs(a[j][i]))
row=j;
}
if(row!=i)swap(a[row],a[i]);
```
by QiFeng233 @ 2020-03-05 09:04:05
@[StudyingFather](/user/22030)
by Smile_Cindy @ 2020-03-05 09:05:17