《变异错误》
1. 数组名不能和定义的结构体类型名重复
2. 你要比较的是结构体类型，但是你的比较函数比较的是 int
by Sprague_Garundy @ 2023-04-05 10:35:48
@[dongrq_cs](/user/644394)
cmp写成了啥
by xiaoming007 @ 2023-04-05 10:36:15
@[Sprague_Garundy](/user/764746)
现在改成了这样
```cpp
#include <bits/stdc++.h>
using namespace std;
struct a{
int b,num;
}q[1010];
bool cmp(a x,a y){
return x.b < y.num;
}
int main(){
int n,i,j;
double t = 0;
cin >> n;
for(i = 1;i <= n;i++){
cin >> q[i].b;
q[i].num = i;
}
sort(q + 1,q + n + 1,cmp);
for(i = 1;i <= n;i++){
cout << q[i].num << " ";
}
cout << endl;
for(j = n - 1;j >= 1;j--){
i = n - j;
t += q[i].b * j;
}
cout << fixed << setprecision(2) << t;
return 0;
}
```
听取WA声一片
by dongrq_cs @ 2023-04-05 11:05:36
@[dongrq_cs](/user/644394) 6
by aidsao @ 2023-04-05 13:08:10
《真·编译错误》
by aidsao @ 2023-04-05 13:08:52
```cpp
#include<bits/stdc++.h>
using namespace std;
struct stu
{
int id,s;
}a[1005];
bool cmp(stu a,stu b)
{
return a.s<b.s;
}
int main()
{
double ans=0;
int n;
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>a[i].s;
a[i].id=i;
}
sort(a+1,a+n+1,cmp);
int j=n-1;
for(int i=1;i<=n;i++)
{
cout<<a[i].id<<" ";
ans+=a[i].s*j;
j--;
}
cout<<endl;
printf("%.2lf",ans/n);
}
```
这样写试试。
by luojunkai @ 2023-04-07 16:42:17