酒店开房系统，java写的哦，不难！大家不要笑话我笨

Posted 2020-07-01

package com;

import java.util.Scanner;

/**
* Created by Frankie on 2016/3/28.
*/
public class HotelSys {
public static int h = 5;
public static int w = 15;
public static String[][] rooms = new String[h][w];

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (true) {
System.out.print("请输入操作(1、开房，2、退房 ，3、查看，0、系统退出):");
int k = sc.nextInt();
switch (k) {
case 1:
System.out.print("请输入房间号:");
int rn = sc.nextInt();
System.out.print("请输入姓名:");
String nn = sc.next();
in(rn,nn);
break;
case 2:
System.out.print("请输入房间号:");
int on = sc.nextInt();
out(on);
break;
case 3:
search();
break;
default:
System.out.println("系统退出");
System.exit(0);
break;
}

}
}

public static void in(int roomnum,String name) {
int r = roomnum/100 -1;
int c = roomnum%100 -1;
//System.out.println(r);
//System.out.println(c);
if(r<0 || r>=h || c<0 || c>=w){
System.out.println("该房间号不存在,开房失败");
}else if(rooms[r][c]==null){
System.out.println("恭喜,开房成功，请牢记你的房间号:"+roomnum);
rooms[r][c]=name;
}else{
System.out.println("该房间号有人,开房失败");
}
}

public static void out(int roomnum) {
int r = roomnum/100 -1;
int c = roomnum%100 -1;
if(r<0 || r>=h || c<0 || c>=w){
System.out.println("该房间号不存在,退房失败");
}else if(rooms[r][c]==null){
System.out.println("该房间没有人入住，退房失败");
}else{
rooms[r][c] = null;
System.out.println("退出成功，房间号:"+roomnum+",欢迎下次光临.");

}
}

public static void search() {
for (int i = 0; i < rooms.length; i++) {
for (int j = 0; j <rooms[i].length ; j++) {
String info = rooms[i][j]==null ? " " : "有人";
int nn = (i+1)*100+j+1;
//System.out.print("\t"+"["+i+"]["+j+"]="+info);
System.out.print("\t房间号:"+nn+"="+info);
//System.err.print("\t"+"["+i+"]["+j+"]="+rooms[i][j]);
}
System.out.println();
}
}
}