java2.7

java2.7

package sume;public class Conversion_exp { static int fun(int n) {  if(n==0||n==1)   return 1;  else   return n*fun(n-1); } public static void main(String[] args) { double e=1;  for(int i=1;i<1000;i++) {   e+=1.00000/fun(i);   if(Math.abs(e-2.7182818)<0.00001) {   System.out.println("e的值为"+e);   }  } }}