1 /** 2 * @author 冰樱梦 3 * 时间:2018年下半年 4 * 题目:数列求和 5 * 6 */ 7 public class Exercise06_13 { 8 public static void main(String[] args){ 9 System.out.printf("%-10s%-12s","i","m(i)" ); 10 System.out.println(" ————————————————————————————————————————————————"); 11 for(int i=1;i<=20;i++){ 12 System.out.printf("%-10d%-10.4f ",i,caculateSum(i) ); 13 } 14 } 15 public static double caculateSum(double number){ 16 double sum=0; 17 for(int i=1;i<=number;i++){ 18 sum+=number/(number+1); 19 } 20 return sum; 21 } 22 23 }