3003279_ac_296ms_2108k.java

来自「北大大牛代码 1240道题的原代码 超级权威」· Java 代码 · 共 29 行

import java.util.*;
import java.math.*;

public class Main
{
	public static void main(String [] arvs)
	{
		Scanner cin = new Scanner (System.in);
		String num;
		int i;
		BigDecimal ans;
		BigDecimal base = new BigDecimal ("8");
		BigDecimal d;

		while(cin.hasNext())
		{
			num = cin.next();
			d = base;
			ans = BigDecimal.ZERO;
			for(i = 2; i < num.length(); i++)
			{
				BigDecimal tmp = BigDecimal.valueOf(num.charAt(i)-'0');
				ans = ans.add(tmp.divide(d));
				d = d.multiply(base);
			}
			System.out.println(num+" [8] = "+ans+" [10]");
		}
	}
}