1 import java.util.Random;       //调用随机数包
 2 import java.util.Scanner;
 3 public class CSZ_demo{
 4         public static void main(String args[]){
 5                 Random ran = new Random();
 6                 int i = ran.nextInt(10);          //随机数赋值给i
 7                 Scanner sc = new Scanner();
 8               while(ture){    
 9                 int j = sc.nextInt(System.in);    //j接收来自键盘的输入
10               if(j<i){
11         System.out.println("猜小了");
12        } else if（j>i）{
13         System.out.println("猜大了");
14          }else{
15         System.out.println("猜对了");
16 break;                                              //猜对break跳出循环
17 }      
18 
19        }                  
20 
21     }
22 }