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编程小贝壳 @ 2020-10-29 11:37:59

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,k,suma,sumb,numa,numb;
    cin>>n>>k;
    for(int i=1;i<=n;i++){
        if(i%k==0){
            suma += i;
            numa++;
        }
        else{
            sumb += i;
            numb++;
        }
    }
    cout<<setprecision(1)<<suma/numa<<' ';
    cout<<setprecision(1)<<sumb/numb;
}

by Waaifu_D @ 2020-10-29 11:45:24

你把定义变量放到主函数外边再试试

by Waaifu_D @ 2020-10-29 11:45:46

在主函数内定义会有奇怪的现象（

by Waaifu_D @ 2020-10-29 11:46:15

#include<bits/stdc++.h>
using namespace std;
int n,k,suma,sumb,numa,numb;
int main()
{
    cin>>n>>k;
    for(int i=1;i<=n;i++){
        if(i%k==0){
            suma += i;
            numa++;
        }
        else{
            sumb += i;
            numb++;
        }
    }
    cout<<suma/numa<<' ';
    cout<<sumb/numb;
}

by ⚡zhangjingcan⚡ @ 2020-10-29 12:18:41

@编程小贝壳 主函数内定义变量不会赋值为0

by 年华天地 @ 2020-10-29 12:19:16

变量定义在函数里初值不为0

by Light_snow @ 2020-10-29 12:20:16

在主函数中定义变量要赋初值

不然初值出现问题

by 蛋蛋工作室 @ 2020-12-29 22:23:33

要设定初始值为0

by 蛋蛋工作室 @ 2020-12-29 22:27:31

#include<bits/stdc++.h>
using namespace std;
int main()
{   int i,n,k,c=0,d=0,e=0,f=0;
    cin>>n>>k;
    for (i=1;i<=n;i++)
    {   if (i%k==0)
        {   c=c+i;
            d=d+1;
        }
        else 
        {   e=e+i;
            f=f+1;
        }
    }
    printf ("%.1lf",(double)c/d);
    cout<<" ";
    printf ("%.1lf",(double)e/f);
    return 0;
}

by 蛋蛋工作室 @ 2020-12-29 22:27:49

这样就可以了

by cinderellawlg @ 2021-01-19 21:59:08

@蛋蛋工作室 为什么？我的改成Double型就由40变100了？谢谢