题解 | #配置文件恢复#

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
            String str = in.nextLine();
            String s1 = "reset";
            String s2 = "reset board";
            String s3 = "board add";
            String s4 = "board delete";
            String s5 = "reboot backplane";
            String s6 = "backplane abort";
            if(str.matches(s1)){
                System.out.println("reset what");
            }
            else if(str.matches(s2)){
                System.out.println("board fault");
            }
            else if(str.matches(s3)){
                System.out.println("where to add");
            }
            else if(str.matches(s4)){
                System.out.println("no board at all");
            }
            else if(str.matches(s5)){
                System.out.println("impossible");
            }
            else if(str.matches(s6)){
                System.out.println("install first");
            }
            else{
                System.out.println("unknown command");
            }
        }
     }
}