假期编程练习-求和

#include<stdio.h>
#include<math.h>
#define f(n) n*n+n+41
int main(void)
{
    int m;
    scanf("%d",&m);
    while(m>0)
    {
        int n;
        scanf("%d",&n);
        double sum=0;
        int flag=1;
        double temp=1;
        int i;
        for(i=1;i<=n;i++)
        {
        
            temp=flag*(1.0/i);
            sum=sum+temp;
            flag=-flag;
        }
        m--;
        printf("%0.2f\n",sum);
    }
  
    return 0;
    
}