@[ljx_gkx](/user/853953)
会用结构体吗？结构体排序会吗？
```cpp
struct node{
int num;
int at;
}a[N];
bool cmp(node x,node y){
return x.num<y.num;
}
......
sort(a+1,a+n+1,cmp);
```
by zqh123b @ 2023-07-29 17:08:58
小数计算的时候最好用double
by Parrhesiates @ 2023-07-29 17:15:31
你把a[],back[]还有s改成double类型试一下
by Parrhesiates @ 2023-07-29 17:18:08
@[zqh123b](/user/587615)
谢谢，学会了。
by ljx_gkx @ 2023-07-30 08:39:02
@[liuyidu](/user/519824)
把s改成longlong，过了，行记住了，下次小数计算用double
by ljx_gkx @ 2023-07-30 08:39:29