while倒数阶乘的和 

 1 package zuoye;
 2 
 3 public class zuoyetest 
 4 {
 5 
 6     public static void main(String[] args) 
 7 {
 8          int c=20;
 9          double d=1;
10          double sum=0;
11          double e=1;
12          
13          while (true)
14          {
15              if (d<=c)
16              {
17                  e=e*d;
18                  e=1/e;
19                  d++;
20                  sum=sum+e;
21                  continue;
22                  
23              }
24              System.out.println("阶乘的和="+sum);
25              if (d>c)
26              {
27                  break;
28              }
29          }
30     }
31 
32 }
zuoye
posted @ 2015-10-07 00:35  宗学唯zi  阅读(256)  评论(1)  编辑  收藏  举报