题解 | #牛牛学数列2#
牛牛学数列2
https://www.nowcoder.com/practice/fc72951f52984f3abd286d82eeffacba
#include<stdio.h>
int main()
{
int n;
double a,sum=0;
scanf("%d",&n);
for(int i=1;i<=n;i++){
a=1/(double)i;
sum+=a;
}
printf("%.6lf",sum);
return 0;
}
