萌新求助，结果没问题，为什么全是wa

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
    float  sum1,sum2;
    int n1,n2,k,n;
    scanf("%d %d",&n,&k);
    for(int i=1;i<=n;i++){
        if(i%k==0){
            sum1+=i;
            n1++;
        }
        else{
            sum2+=i;
            n2++;
        }
    }
    printf("%.1f ",sum1/n1);
    printf("%.1f",sum2/n2);
    return 0;
}