南昌航空大学BLOG-1

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        Menu menu=new Menu();
        Order order=new Order();
        String line = sc.nextLine(); //读取一行输入
        while (!line.equals("end")) { //如果输入不是"end"
            String[] parts = line.split(" "); //按空格分割输入
            if(parts.length==4){
                order.addARecord(Integer.parseInt(parts[0]),parts[1],Integer.parseInt(parts[2]),Integer.parseInt(parts[3]),menu);
            }
            if(parts.length==2){
                if(Character.isDigit(parts[0].toCharArray()[0])){
                    order.delARecordByOrderNum(Integer.parseInt(parts[0]));
                }else {
                    menu.addDish(parts[0],Integer.parseInt(parts[1]));
                }
            }
            line = sc.nextLine(); //读取下一行输入
        }
        order.print();
        int totalPrice = order.getTotalPrice(); //计算订单总价
        System.out.println(totalPrice); //输出总价
    }
}
class Dish {
    String name;
    int unit_price;

    public Dish(String name, int unit_price) {
        this.name = name;
        this.unit_price = unit_price;
    }

    public int getPrice(int portion) {
        if (portion == 1) return unit_price;
        else if (portion == 2) return (int) Math.round(unit_price * 1.5);
        else return unit_price * 2;
    }
}

class Menu {
    Dish[] dishs;
    int cnt = 0;

    public Menu() {
        dishs = new Dish[100];
    }
    public Dish searchDish(String dishName) {
        for (int i = 0; i < cnt; i++) {
            if (dishs[i].name.equals(dishName)) return dishs[i];
        }
        return null;
    }

    public void addDish(String dishName, int unit_price) {
        dishs[cnt++] = new Dish(dishName, unit_price);
    }
}

class Record {
    int orderNum;
    Dish d;
    int portion;
    int num;

    @Override
    public String toString() {
        return "Record{" +
                "orderNum=" + orderNum +
                ", d=" + d +
                ", portion=" + portion +
                ", num=" + num +
                '}';
    }

    public Record(int orderNum, Dish d, int portion, int num) {
        this.orderNum = orderNum;
        this.d = d;
        this.portion = portion;
        this.num=num;
    }

    public int getPrice() {
        return d.getPrice(portion)*num;
    }
}

class Order {
    Record[] records = new Record[100];
    int cnt = 0;

    Record addARecord(int orderNum,String dishName,int portion,int num,Menu menu){
        Dish dish = menu.searchDish(dishName);//根据输入的dishName在Menu中查找对应的Dish对象
        if(dish != null){//如果存在该Dish对象
            Record record = new Record(orderNum,dish,portion,num);//创建一个新的Record对象
            records[cnt++] = record;//将Record对象添加到records数组中，并更新size值
            return record;
        }else{//如果不存在该Dish对象
            System.out.println(dishName + " does not exist");//输出提示信息
            return null;
        }
    }

    public void delARecordByOrderNum(int orderNum){
        int flag=cnt;
        for(int i=0;i<cnt;i++){
            if(records[i].orderNum==orderNum){
                for (int j = i; j <records.length-1 ; j++) {
                    records[i]=records[i+1];
                }
                cnt--;
                break;
            }
        }
        if(flag==cnt){
            System.out.println("delete error");
        }
    }

    public Record findRecordByOrderNum(int orderNum){
        for(int i=0;i<cnt;i++){
            if(records[i].orderNum==orderNum)return records[i];
        }
        return null;
    }

    public void print(){
        for(int i=0;i<cnt;i++){
            System.out.println(records[i].orderNum+" "+records[i].d.name+" "+records[i].getPrice());
        }
    }

    public int getTotalPrice(){
        int res=0;
        for(int i=0;i<cnt;i++){
            res+=records[i].getPrice();
        }
        return res;
    }
}