简单Java递归运算

要求计算以下程序的结果：1! + 2! + 3! + …. + 35!，求出结果。

方法一：通过普通的循环完成

public class MethodDemo01 {          public static void main(String args[]){                    double sum = 0.0 ;                    for(int x=1;x<35;x++){                             double temp = 1 ;                             for(int y=1;y<=x;y++){                                      temp *= y ;                             }                             sum += temp ;                    }                    System.out.println(sum) ;          } };

方法二：通过递归完成

public class MethodDemo02 {          public static void main(String args[]){                    double sum = 0.0 ;                    for(int x=1;x<35;x++){                             sum += fun(x) ;                    }                    System.out.println(sum) ;          }          public static double fun(int temp){                    if(temp==1){                             return 1 ;                    }else{                             return temp * fun(temp-1) ;                    }          } };