猜数小游戏java代码

import java.util.*;//1
import java.io.*; //2
public class CaiShu{ 
public static void main(String[] args) throws IOException{ 
System.out.println("请选择一个难度：1，初级（100以内）；2高级（200以内）);//3
System.out.println("请输入你的选择：");//4
 BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));//5 
String str=bf.readLine(); //6
int choice=Integer.parseInt(str);//7 
for (choice<=0&&choice>=3){
System.out.println("输入有误，请重输！");//8
BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));//9 
String str=bf.readLine(); //10
int choice=Integer.parseInt(str);//11
}
if（choice==1）{
Random a=new Random();//12 
int num=a.nextInt(100); //13
System.out.println("请输入一个100以内的整数：");//14 
for (int i=0;i<=9;i++){ 

BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));//15
String str=bf.readLine(); //16
int shu=Integer.parseInt(str);//17 
for(shu>=100&&shu<=0){
  System.out.println("请重新输入一个100以内的整数！注意数的范围！");//18
  BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));//19
  String str=bf.readLine();//20
  int shu=Integer.parseInt(str); //21
}