牛牛学数列2
#include<stdio.h>
int main(){
int n;
double sum = 0;
scanf("%d",&n);
for(int i = 1;i<=n;i++){
sum = sum+1.0/i;
}
printf("%.6lf",sum);
}
int main(){
int n;
double sum = 0;
scanf("%d",&n);
for(int i = 1;i<=n;i++){
sum = sum+1.0/i;
}
printf("%.6lf",sum);
}
