JAVA输入三个数的判断

import java.io.*;
public class Cheng{
public static void main(String arg[]){

try{
System.out.println("请输入0~100之间的任意数");
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
int n=Integer.parseInt(in.readLine());
}
catch(IOException e)
{

}
// String[] num =new String[];
int i=n/10;

switch(i){
case 10:
case 9:
System.out.println("A");
break;
case 8:
System.out.println("B");
break;
case 7:
System.out.println("C");
break;
case 6:
System.out.println("D");
break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:
System.out.println("E");
break;}
}
}

import java.io.*;
public class Cheng{
public static void main(String arg[]){
int n=0;
try{
System.out.println("请输入0~100之间的任意数");
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
n=Integer.parseInt(in.readLine());
}
catch(IOException e)
{

}
// String[] num =new String[];
int i=n/10;

switch(i){
case 10:
case 9:
System.out.println("A");
break;
case 8:
System.out.println("B");
break;
case 7:
System.out.println("C");
break;
case 6:
System.out.println("D");
break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:
System.out.println("E");
break;}
}
}