hdu 1753 a+b Java Decimal类

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

public class Main{
	public static void main(String args[]){
		Scanner cin=new Scanner(System.in);
		BigDecimal a,b;
		String c;
		while(cin.hasNext()){
			a=cin.nextBigDecimal();
			b=cin.nextBigDecimal();
			a=a.add(b);
			c=a.stripTrailingZeros().toPlainString();/*stripTrailingZeros()去掉后缀多余的0，toPlainString()去掉指数形式*/
		/*
			if(c.startsWith("0."))  //eg:0.1 == .1
				c = c.substring(1); 
		*/
			System.out.println(c);
		}
	}
}