java之输入分数（小数）评等级

import java.util.Scanner;

public class rui{

static public  void main(String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("涂涂喊你输入分数：");
double score = Double.valueOf(sc.nextDouble());
String level = new String("空");
if(score>=90 && score<=100)
level = "A";
else if(score>=80 && score<90)
level = "B";
else if(score>=70 && score<80)
level = "C";
else if(score>=60 && score<70)
level = "D";
else if(score>=0 && score<=60)
level = "E";
else
System.out.println("涂涂说你输入的是无效分数啊！！！");
System.out.println("涂涂说你的成绩是：	"+level);
}
}