求指导哪里不对

试了很多次2绿3红

#include <bits/stdc++.h>
using namespace std;
int main() 
{
float sum1=0.0;
float sum2=0.0;
int i,n,k,num1,num2;
cin >> n >> k;
num1 =0;
num2 =0;
for(i=1; i<=n; i++)
{
    if(i%k==0)
    {
        sum1 = sum1 +i;
        num1++;
    }
    else if(i%k!=0)
    {
        sum2 = sum2 +i;
        num2++;
    }
}
printf("%.1f",sum1/num1);
cout << " ";
printf("%.1f",sum2/num2);

return 0;
}