求助大佬帮改
本帖最后由 美味佳肴 于 2022-5-7 14:41 编辑怎么删帖啊 我也不知道。
不过你的问题有趣，纯粹想学习学习：
Javaimport java.util.Scanner;
public class Main {
public static double f(int n) { return (1 / (2. * n - 1)) - (1 / (2. * n)); }
public static double s(int n) { return n == 1 ? f(n) : f(n) + s(n - 1); }
public static void main(String[] args) {
Scanner cin = new Scanner(System.in);
int num = cin.nextInt();
System.out.println(s(num));
}
}
C++#include <iostream>
auto f = [](int n) -> double { return (1 / (2. * n - 1)) - (1 / (2. * n)); };
double s(int n) { return n == 1 ? f(n) : f(n) + s(n - 1); }
using std::cin, std::cout, std::endl;
int main(void) {
int num;
cin >> num;
cout << s(num) << endl;
return 0;
}
Pythonf = lambda n: (1 / (2 * n - 1)) - (1 / (2 * n))
s = lambda n: f(n) if n == 1 else f(n) + s(n - 1)
if __name__ == "__main__":
num = int(input())
print(s(num))
C#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
double f(int n) { return (1 / (2. * n - 1)) - (1 / (2. * n)); }
double s(int n) { return n == 1 ? f(n) : f(n) + s(n - 1); }
int main(void) {
int num;
if(scanf("%d", &num));
printf("%lf\n", s(num));
return 0;
}
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