555...上次做过一次，这次就AC不了了。

makeway @ 2024-08-09 20:42:50

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int b;
    double c=0,d;
    cin>>b;
    double a[b];
    for(c;c<=b;c++){
        cin>>a[b];
        d+=a[b];
    }
    cout<<fixed<<setprecision(2)<<d/b<<endl;
    return 0;
}

by makeway @ 2024-08-09 21:01:50

@GoodLuckCat 谢谢大佬

by 13307661995cyf @ 2024-08-17 15:51:14

@makeway

#include<bits/stdc++.h>
using namespace std;
int main(){
    int b;
    double c=0,d=0;
    cin>>b;
    double a[b+1];
    for(c;c<b;c++){
        cin>>a[b];
        d+=a[b];
    }
    cout<<fixed<<setprecision(2)<<d/b<<endl;
    return 0;
}

by Jason101 @ 2024-08-20 18:54:47

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    double a , b , c = 0;
    cin >> n;
    for(int i = 1;i <= n;i++)
    {
        cin >> a;
        c = c + a;  
    }   
    double s = c / n;
    printf("%.2lf",s);
    return 0;
}