[問題] 面試遇到的題目

[joetsai (酒菜)]

今天去面試的考試是上機考java  題目如下

有一戲院有30個座位

預約座位時以隨機決定顯示座位號碼

如果座位滿了顯示座位已滿

class名稱為Reservation  method名稱為Reserve

以Random.nextFloat()亂數決定

我算是寫出來了  但是覺得寫的不好  不知道版上哪位高手能給個意見

謝謝

import java.util.Random;
import java.util.Scanner;

public class Reservation {
        private boolean[] seat;
        private int seat_count = 30;

        public Reservation(){
                seat = new boolean[seat_count];
                for(int i = 0; i < seat.length; i++){
                        seat[i] = false;
                }
        }

        public static void main(String args[]){
                Reservation res = new Reservation();
                Scanner sc = new Scanner(System.in);
                System.out.print("請問要預約戲院座位嗎?[Y/N]:");
                String answer = sc.nextLine();
                while(answer.equals("y") || answer.equals("Y")){
                        if(!res.Reserve()){
                                break;
                        }
                        System.out.print("請問還要預約戲院座位嗎?[Y/N]:");
                        answer = sc.nextLine();
                }
        }

        public boolean Reserve(){
                if(seat_count > 0){
                        Random ran = new Random();
                        int order = (int) (ran.nextFloat() * seat_count) + 1;
                        int seat_number = 1;
                        while(order > 0){
                                if(seat[seat_number - 1] == false){
                                        order--;
                                }
                                seat_number++;
                        }
                        seat[seat_number-2] = true;
                        seat_count--;
                        System.out.println("你預約到 " + (seat_number - 1)
                                 + " 號座位");
                        return true;
                }
                else{
                        System.out.println("不好意思位子已滿!!!");
                        return false;
                }
        }

}

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◆ From: 122.125.228.176
※ 編輯: joetsai         來自: 122.125.228.176      (08/12 22:01)
推 slalala:我選位置那邊會用NextInt...限定為3O
推 slalala:ran.nextInt(30)+1
→ joetsai:限定要以nextFloat()選位置 沒打清楚 抱歉
推 runtime:判斷Yy我會先統一轉小寫再判斷