java高精度进制转换

 1 import java.util.*;
 2 import java.math.*;
 3 
 4 public class Main
 5 {
 6     public static void main(String []args)
 7     {
 8         Scanner cin = new Scanner(System.in);
 9         BigDecimal ans, t, tmp;
10         while(cin.hasNext())
11         {
12             String st = cin.nextLine();         
13             t = BigDecimal.valueOf(1);
14             ans = BigDecimal.valueOf(0);
15             int i, sta = st.indexOf(‘.‘);        
16             for(i = sta + 1; i < st.length(); i ++)
17             {
18                 tmp = BigDecimal.valueOf(st.charAt(i) - ‘0‘);
19                 t = t.divide(new BigDecimal("8"));
20                 tmp = tmp.multiply(t);
21                 ans = ans.add(tmp);
22             }
23             System.out.println(st+" [8] = "+ans+" [10]");
24         }
25     }
26 }