140 - 家電類

Time Limit: 1000   Memory Limit: 65535 Submit: 401  Solved: 294

Description

某大型家電企業擁有一批送貨卡車，運送電視機、洗衣機、空調等家電。程式設計計算每個卡車所裝載貨物的總重量。要求有一個Appliance（家電）介面和有三個實現類TV、WashMachine和AirConditioner，這些類能夠提供自重。有一個Truck類，包含了該貨車上的所有家電，用一個集合（陣列或集合類）表示。
Main函式中程式能夠輸出Truck類所裝載貨物的總重量。

Input

家電數量
家電種類編號 家電重量

注意：各個家電的編號為：TV：1  WashMachine：2  AirConditioner：3
 

Output

總重量

Sample Input

5
1 20
2 30
3 25
3 30
2 40

Sample Output

145

HINT

Pre Append Code

Post Append Code

import java.util.Scanner;
interface Appliance  //家電介面

{ 

    

    public int getWeight();//定義方法，getWeight()

}

abstract class elec implements Appliance{

    

    public abstract int getWeight();

}

class TV extends elec implements Appliance{  //使用介面（實現介面的類：要實現介面中定義的所有方法）

    private int weight;

    

    TV(int weight){

        this.weight = weight;

    }

    public int getWeight(){

        return weight;

    }

}

class WashMachine extends elec implements Appliance{

    private int weight;

    

    WashMachine(int weight){

        this.weight = weight;

    }

    public int getWeight(){

        return weight;

    }

}

class AirConditioner extends elec implements Appliance{

    private int weight;

    

    AirConditioner(int weight){

        this.weight = weight;

    }

    public int getWeight(){

        return weight;

    }

}

class Truck{

    int weight = 0;

    int n;

    elec[] s;

    public void getCount(){

        Scanner scan = new Scanner(System.in);

        n = scan.nextInt();//獲取家電數目

        s = new elec[n];//申請elec集合類

        for(int i = 0;i < n;i ++)//for迴圈輸入家電資訊

        {

            int type = scan.nextInt();

            int w = scan.nextInt();

            if(type == 1)

                s[i] = new TV(w);

            else if(type == 2)

                s[i] = new WashMachine(w);

            else if(type == 3)

                s[i] = new AirConditioner(w);

        }

    }

    public int getWeight(){//獲取家電總質量

        for(int i = 0;i < n;i ++)

            weight += s[i].getWeight();

        return weight;

    }

}

public class Main {

    public static void main(String [] args){

        Truck t = new Truck();

        t.getCount();

        System.out.println(t.getWeight());

    }

}