题解 | #牛牛学数列2#
牛牛学数列2
https://www.nowcoder.com/practice/fc72951f52984f3abd286d82eeffacba
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main() {
int n = 0;
double sum = 0;
cin>>n;
for (int i = 1; i <= n; i++) {
sum += 1.0 / i;
}
cout << fixed << setprecision(6) << sum;
system("pause");
return 0;
}
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