double sum
by __wxlg__ @ 2022-01-18 11:17:51
```
int n,sum;
......
p=sum/n;
```
整型除整型，会向下取整
```
1.改为p=sum*1.0/n
2.改为double sum
```
by _meant_to_be_ @ 2022-01-18 11:27:38
@[wlt0716](/user/475219) 蟹蟹
by luqyou @ 2022-01-18 11:53:59