大佬995

Yjkaixuexi @ 2024-11-16 19:37:56

#include<bits/stdc++.h>
using namespace std;
int main(){
    float n,b=0;
    int a[105];
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    for(int i=0;i<n;i++){
        b=b+a[i];
    }
    float w=b/n;
    cout<<b<<" "<<w;
}

by xjhjtz0320 @ 2024-11-17 10:51:00

@Yjkaixuexi 已AC

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    double a=0,ans=0;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>a;
        ans+=a;
    }
    ans/=n*1.0000;
    printf("%.4lf",ans);
 } 

可以不用数组，首先一边读入一边累加，然后除n，乘1.0000其实可不加 然后用printf输出，注意输出格式

by VVinky_ @ 2024-11-20 23:18:05

#include <iostream>
#include <cstdio>

using namespace std;

int main()
{
    int N;
    double sum;
    scanf("%d", &N);
    for (int i = 1; i <= N; i ++)
    {
        double j;
        scanf("%lf", &j);
        sum += j;
    }
    printf("%.4lf", sum / N);
    return 0;
}