1 package com.yhqtv.duotai;
 2 
 3 import java.util.Scanner;
 4 import java.util.Vector;
 5 
 6 public class Test {
 7 
 8     public static void main(String[] args) {
 9         Scanner sc=new Scanner(System.in);
10         Vector v=new Vector();
11 
12         int max=0;
13         for (;;){
14             System.out.println("请输入学生成绩，以负数结束");
15             int scores = sc.nextInt();
16             if(scores<0){
17                 break;
18             }
19             if(scores>100){
20                 continue;
21             }
22 
23             v.addElement(scores);
24             if(max<scores){
25                 max=scores;
26             }
27         }
28         char level;
29         for (int i = 0; i < v.size(); i++) {
30             Integer in=(Integer)v.elementAt(i);
31             int i1 = max - in;
32             if(i1<10){
33                 level='A';
34             }else if (i1<20){
35                 level='B';
36             }else if (i1<30){
37                 level='C';
38             }else {
39                 level='D';
40             }
41 
42             System.out.println("student"+i+"  scores-"+in+"  level-"+level);
43         }
44     }
45 }