求助大佬！

Little_Elephant @ 2021-06-02 19:18:53

#include <iostream>
#include <iomanip>
#include <cstdio>
using namespace std;
int main()
{
    int i,n,k;
    int ans = 0,total = 0;
    int a,b;
    cin >> n >> k;
    for(i = 1; i <= n ; i++)
    {
        if(i % k != 0)
       {
                b += i;
                total++;
       }
        if(i % k == 0)
       {
                a += i;
                ans++;
        }
    }
    cout << fixed << setprecision(1) << a/ans << ".0" << " " <<(double)b / total; 
   return 0;
}

by Nt_Tsumiki @ 2021-06-02 19:22:55

你用一下printf

by Nt_Tsumiki @ 2021-06-02 19:23:39

#include<iostream>
#include<cstdio>
using namespace std;
int main()
{
    int n,k;double ai=0,arr=0,bi=0,brr=0;
    cin>>n>>k;
    for(int i=1;i<=n;i++)
    {
        if(i%k==0)
        {
            ai+=i;
            arr++;
        }
        else
        {
            bi+=i;
            brr++;
        } 
    }
    printf("%.1lf %.1lf",ai/arr,bi/brr);
}

by Little_Elephant @ 2021-06-03 13:38:50

谢谢！

by Lucas_2021 @ 2021-07-14 09:35:33

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
    int n,k;
    cin >> n >> k;
    int a = 0;
    int b = 0;
    int a2 = 0;
    int b2 = 0;
    for (int i = 1; i <= n; i++)
    {
        if (i % k == 0)
        {
            a = a + i;
            a2 = a2 + 1;
        }
        else
        {
            b = b + i;
            b2 = b2 + 1;
        }
    }
    cout<<fixed<<setprecision(1) << a * 1.0 / a2 << " " << b * 1.0 / b2;

    return 0;
}