设计模式第二天|工厂方法模式 2.积木工厂 抽象工厂模式 3. 家具工厂

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【设计模式专题之工厂方法模式】2.积木工厂

文章链接：卡码网设计模式
题目链接：2.积木工厂

注意C++默认的构造函数是public的，但不写public时默认的数据和方法是private的，struct默认的数据和方法是public的。

#include <iostream>
#include <bits/stdc++.h>
using namespace std;class Block{
public:virtual void produce() = 0;
};class CircleBlock : public Block{
public:void produce() override{cout << "Circle Block" << endl;}  
};class SquareBlock : public Block{
public:void produce() override{cout << "Square Block" << endl;}
};class BlockFactory{
public:virtual Block* createBlock() = 0;
};class CircleBlockFactory : public BlockFactory{
public:Block* createBlock() override{return new CircleBlock();}  
};class SquareBlockFactory : public BlockFactory{
public:Block* createBlock() override{return new SquareBlock();} 
};class BlockFactorySystem{
private:vector<Block*> blocks;
public:void produceBlocks(BlockFactory* factory, int quantity){for (int i = 0; i < quantity; i++){Block* block = factory->createBlock();blocks.push_back(block);block->produce();}}~ BlockFactorySystem(){for (Block* item : blocks){delete item;}}
};int main(){BlockFactorySystem factorysystem;int allcount;cin >> allcount;for (int i = 0; i < allcount; i++){string blocktype;int quantity;cin >> blocktype >> quantity;if (blocktype == "Circle"){factorysystem.produceBlocks(new CircleBlockFactory(), quantity);}else if (blocktype == "Square"){factorysystem.produceBlocks(new SquareBlockFactory(), quantity);}}return 0;   
}

【设计模式专题之抽象工厂模式】3. 家具工厂

文章链接：卡码网设计模式
题目链接：3. 家具工厂

注意跟工厂方法模式的区别，工厂方法模式一个工厂生产一类产品，抽象工厂模式一个工厂生产一类产品。

#include <iostream>
#include<bits/stdc++.h>
using namespace std;class Chair{
public:virtual void showInfo() = 0;
};class MordenChair : public Chair{
public:void showInfo() override{cout << "modern chair" << endl;}
};class ClassicalChair : public Chair{
public:void showInfo() override{cout << "classical chair" << endl;}
};class Sofa{
public:virtual void displayInfo() = 0;
};class MordenSofa : public Sofa{
public:void displayInfo() override{cout << "modern sofa" << endl;}
};class ClassicalSofa : public Sofa{
public:void displayInfo() override{cout << "classical sofa" << endl;}
};class Factory{
public:virtual Chair* produceChair() = 0;virtual Sofa* produceSofa() = 0;
};class ModernFactory : public Factory{
public:Chair* produceChair() override{return new MordenChair();}Sofa* produceSofa() override{return new MordenSofa();}
};class ClassicalFactory : public Factory{
public:Chair* produceChair() override{return new ClassicalChair();}Sofa* produceSofa() override{return new ClassicalSofa();}
};int main(){int N;cin >> N;for (int i = 0; i < N; i++){string type;cin >> type;Factory* factory = nullptr;if (type == "modern"){factory = new ModernFactory();}else if (type == "classical"){factory = new ClassicalFactory();}Chair* chair = factory -> produceChair();Sofa* sofa = factory -> produceSofa();chair->showInfo();sofa->displayInfo();delete factory;delete chair;delete sofa;}return 0;
}

设计模式第二天打卡，加油！！！

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