lvyan2024 @ 2025-01-11 13:18:03

#include <iostream>
#include <cstdio>
using namespace std;
int main() {
    int n;
    long double sum=0;
    cin>>n;
    int a[n];
    for (int i = 0; i < n; ++i) {
        cin>>a[i];
    }
    for (int i = 0; i < n; ++i) {
        sum+=a[i];
    }
    printf("%.2Lf",sum/n);
}

by chenyuan3 @ 2025-01-11 13:30:11

"%.2Lf" 改为 "%.2lf" （l 不大写）@lvyan2024

by pjh0625 @ 2025-01-11 13:56:39

@lvyan2024

你的代码改了“%.2lf”也应该过不了

Me 代码：

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    scanf("%d",&n);
    int age;
    double sum=0,f=0;
    int i;
    for(i=0;i<n;i++)
    {
        scanf("%d",&age);
        sum=sum+age;
    }
    f=sum/n;
    printf("%.2lf",f);
    return 0;
 } 

by xty0627 @ 2025-01-11 14:24:39

**printf("%.2Lf",sum/n);** 改为 printf("%.2f",sum/n); 具体代码为：

#include<bits/stdc++.h>
int main(){
    int n,x;
    double sum=0;
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
        scanf("%d",&x);
        sum+=x;
    }
    printf("%.2f",sum/n);
    return 0;
}

by Whr___114514 @ 2025-01-11 14:29:20

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

我就是习惯用iomanip，iostream。