poj 1131java大数类

import java.math.*;import java.util.Scanner;public class Main {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubScanner input = new Scanner(System.in);BigDecimal one = new BigDecimal(1), eight = new BigDecimal(8);String str;while (input.hasNext()) {BigDecimal ans = new BigDecimal(0);BigDecimal a = one.divide(eight);str = input.next();for (int i = 2; i < str.length(); i++) {ans = ans.add(a.multiply(new BigDecimal(str.charAt(i) - 48)));a = a.divide(eight);}System.out.println(str + " [8]" + " = " + ans.toString() + " [10]");}}}