import java.util.Scanner;
import java.util.Random;
public class Vc{
    public static void main(String[] args){
      Scanner pang=new Scanner(System.in);
      Random yu=new Random();
      System.out.println("请你输入用户名");
      String name=pang.next();
      System.out.println("请你输入密码");
      String pass=pang.next();
      if(name.equals("XXX")  &&  pass.equals("123456")){
             System.out.println("欢迎使用本系统！");
       while(1==1){
       System.out.println("请您输入所猜数字！");
       int num1=pang.nextInt();
       int num2=yu.nextInt(10);
       if(num1==num2){
           System.out.println("恭喜您，答对了！");
           System.out.println("请你输入第一个数字");
           int num3=pang.nextInt();
           System.out.println("请你输入第二个数字");
           int num4=pang.nextInt();
           System.out.println("请你输入运算符");
           char suan=pang.next().charAt(0);
           int set=0;
           if(suan=='+'){
              set=num3+num4;
              System.out.println("计算结果="+set);
           }
           else if(suan=='-'){
             set=num3-num4;
              System.out.println("计算结果="+set);
           }
           else if(suan=='*'){
             set=num3*num4;
              System.out.println("计算结果="+set);
           }
           else if(suan=='/'){
             set=num3/num4;
              System.out.println("计算结果="+set);
           }
           else{
                 System.out.println("您输入的运算符无效");
           }
              break;
          
       }
       if(num1<num2){
           System.out.println("不好意思，您猜小了！"+num2);
       }
       if(num1>num2){
           System.out.println("不好意思，您猜大了！"+num2);
       }
       }
      }
      else{  System.out.println("密码或用户名输入错误！");
      }
    } }