刚学OI，弟弟求助

一大 @ 2021-02-05 21:15:00

#include<bits/stdc++.h>
using namespace std;
double a,a1,b1,b;
int main(){
    int n,k;
    cin>>n>>k;
    for(int i=1;i<=n;i++){
        if(!i%k) a+=i,a1++;
        else b+=i,b1++;  
    }
    printf("%0.1f %0.1f",a/a1,b/b1);
}

by ud2_ @ 2021-02-05 21:19:08

@一大

!i%k

没看懂（

by 一大 @ 2021-02-05 21:22:41

@sjx233_ 就是i%k==0的意思啊

by Terrible @ 2021-02-05 21:24:49

@一大

优先级出问题了

!(i%k)

by yummy @ 2021-02-05 21:24:52

@一大 建议要么直接写==0，要么加括号，有可能先算了!i

by Nephrenn @ 2021-02-05 21:24:56

@一大 !优先级大于%

by Terrible @ 2021-02-05 21:26:09

by 一大 @ 2021-02-05 21:27:11

谢谢大神