Dear123 @ 2023-11-17 21:25:46

#include <iostream>
using namespace std;
int main(){
    int n,k,a=0,b=0;
    float sum1,sum2;
    cin>>n>>k;
    for(int i=1;i<=n;i++){
        if(i%k==0) {
            sum1+=i;
            a++;
        }
        else {
            sum2+=i;
            b++;
        }
    }
    printf("%.1f %.1f",sum1/a,sum2/b);
}

by penguin_is_cool @ 2023-11-17 21:37:27

AC代码:

#include <iostream>
using namespace std;
int main(){
    int n,k;
    double sum=0,sum1=0,c,d;
    cin>>n>>k;
    for (int i=1;i<=n;i++){
        if (i%k==0){
            sum+=i;
            c++;
        }
        else{
            sum1+=i;
            d++;
        }
    }
    printf("%.1f %.1f",sum/c,sum1/d);
}

不开double见祖宗

@Dear123

by penguin_is_cool @ 2023-11-17 21:38:28

@Dear123 你的sum1和sum2要初始化，全为零

by Dear123 @ 2023-11-19 00:18:45

@penguin_is_cool 好的，谢谢！