OJ 2312 Problem B Peach

Description

Jackie开了一家水果店，店里开展了新业务：榨果汁和水果沙拉。他发现桃子（Peach）不论是榨果汁还是水果沙拉都很受欢迎。除了桃子（Peach）还有3种水果苹果（Apple）、菠萝（Pineapple）、香蕉（Banana）也进入了新业务。
这4种水果（Fruit）被分成了三个种类：榨汁（Juice）类、沙拉（Salad）类、能榨汁也能做沙拉（JuiceSalad）类。其中，菠萝只能榨汁、香蕉只能做沙拉、桃子和苹果是既能榨汁也能做沙拉。
所有的水果都有属性重量（weight）。 能榨汁的水果具有属性榨汁率（juice_ratio）。
能做沙拉的水果也有个属性是做成沙拉后保存率（salad_ratio）。
既能榨汁又能做沙拉的水果，会把60%用来榨果汁、40%用来做沙拉，因此具有juice_ratio和salad_ratio两个属性。
现在有水果的进货数据，请你编写程序计算水果总量、榨汁总量和沙拉总量。
用C++编写Peach类、Apple类、Banana类、Pineapple类和它们的继承关系来完成代码，调用格式见“Append
Code”。 Fruit::weight()水果的重量。
juice_weight()和salad_weight()分别用来计算水果榨汁的重量和做成沙拉的重量，都是多态函数。
各类的构造根据给出的调用代码完成。

Input

第一行输入整数k，表示后面有k个记录。每个记录水果的名称、重量、榨汁率和做成沙拉后的保存率，只能榨汁或只能做沙拉的水果仅有一个能用的比例。

Output

输出这些水果的总重量、榨汁的总量和做成沙拉的总量。

Sample Input

4
Peach 100 0.67 0.55
Pineapple 50 0.5
Banana 80 0.88
Apple 200 0.4 0.6

Sample Output

All fruits weight 430 kg.
These fruits can juicing 113.2 kg fruit juice.
These fruits can making 140.4 kg fruit salad.

HINT

Accepted Code

/**
 *  计算机科学与技术2019-3,4：程序设计基础（2-2）—作业10
 *  14点39分
 */

#include <iostream>
#include <iomanip>
#include <algorithm>

using namespace std;

class Fruit {
protected:
    double wei;
public:
    Fruit(double w = 0) : wei(w) {}
    virtual double weight() {
        return wei;
    }
};
class Juice : virtual public Fruit {
protected:
    double juice_ratio;
public:
    Juice(double w, double r) : Fruit(w), juice_ratio(r) {}
    virtual double juice_weight() = 0;
};
class Salad : virtual public Fruit {
protected:
    double salad_ratio;
public:
    Salad(double w, double r) : Fruit(w), salad_ratio(r) {}
    virtual double salad_weight() = 0;
};
class JuiceSalad:public Salad,public Juice
{
public:
    JuiceSalad(double weight, double j_ratio, double s_ratio)
    : Juice(weight, j_ratio), Salad(weight, s_ratio) , Fruit(weight){}
    double juice_weight() {
        return 0.6 * wei * juice_ratio;
    }
    double salad_weight() {
        return 0.4 * wei * salad_ratio;
    }

};
class Pineapple : public Juice {
public:
    Pineapple(double w, double r) : Juice(w, r) , Fruit(w) {}
    double juice_weight() {
        return wei * juice_ratio;
    }
};
class Banana : public Salad {
public:
    Banana(double w, double r) : Salad(w, r), Fruit(w) {}
    double salad_weight() {
        return wei * salad_ratio;
    }
};
class Peach : public JuiceSalad {
public:
    Peach(double weight, double j_ratio, double s_ratio)
    : JuiceSalad(weight, j_ratio, s_ratio), Fruit(weight) {}
};
class Apple : public JuiceSalad {
public:
    Apple(double weight, double j_ratio, double s_ratio)
    : JuiceSalad(weight, j_ratio, s_ratio), Fruit(weight) {}
};

int main()
{
    Fruit* fruit[100];
    Juice* juice[100];
    Salad* salad[100];

    string name;
    int cases, f, j, s;
    f = j = s = 0;
    cin >> cases;
    while(cases--)
    {
        cin >> name;
        double weight, s_ratio, j_ratio;
        if(name == "Peach")
        {
            cin >> weight >> j_ratio >> s_ratio;
            Peach* p = new Peach(weight, j_ratio, s_ratio);
            fruit[f++] = p;
            juice[j++] = p;
            salad[s++] = p;
        }
        if(name == "Pineapple")
        {
            cin >> weight >> j_ratio;
            Pineapple* p = new Pineapple(weight, j_ratio);
            fruit[f++] = p;
            juice[j++] = p;
        }
        if(name == "Banana")
        {
            cin >> weight >> s_ratio;
            Banana* b = new Banana(weight, s_ratio);
            fruit[f++] = b;
            salad[s++] = b;
        }
        if(name == "Apple")
        {
            cin >> weight >> j_ratio >> s_ratio;
            Apple* a = new Apple(weight, j_ratio, s_ratio);
            fruit[f++] = a;
            juice[j++] = a;
            salad[s++] = a;
        }
    }

    double fruit_weight, salad_weight, juice_weight;
    fruit_weight = salad_weight = juice_weight = 0;
    for(int i = 0; i < f; i++)
        fruit_weight += fruit[i]->weight();
    cout << "All fruits weight " << fruit_weight << " kg." << endl;
    for(int i = 0; i < j; i++)
        juice_weight += juice[i]->juice_weight();
    cout << "These fruits can juicing " << juice_weight << " kg fruit juice." << endl;
    for(int i = 0; i < s; i++)
        salad_weight += salad[i]->salad_weight();
    cout << "These fruits can making " << salad_weight << " kg fruit salad." << endl;
}