/*题目：编写一个函数，输入n为偶数时，调用函数求1/2+1/4+...+1/n,当输入n为奇数时，调用函数1/1+1/3+...+1/n(利用指针函数) */import java.util.*;public class Example39{public static void main(String args[]){Scanner sc=new Scanner(System.in);System.out.print("请输入一个数：");int num=sc.nextInt();double result=0.0;if(num%2==0){result=oushu(num);}else{result=jishu(num);}System.out.print("结果："+result);}public static double oushu(int n){double sum=0.0;for(int i=2;i<=n;i=i+2){sum=sum+(float)1/i;}return sum;}public static double jishu(int n){double sum=0.0;for(int i=1;i<=n;i=i+2){sum=sum+(float)1/i;}return sum;}}