C++简单工厂模式(2)

简单工厂实现代码:

#include 
#include 
using namespace std;
//产品抽象父类
class Operation {
   public:
    double m_leftVlaue;
    double m_rightValue;
    virtual double GetResult() = 0;
};
//具体产品实现类
class AddOperation : public Operation {
    double GetResult() { return m_leftVlaue + m_rightValue; }
};
class SubOperation : public Operation {
    double GetResult() { return m_leftVlaue - m_rightValue; }
};

class MulOperation : public Operation {
    double GetResult() { return m_leftVlaue * m_rightValue; }
};

class DivOperation : public Operation {
    double GetResult() { return m_leftVlaue / m_rightValue; }
};
//工厂类
class OperatorFactory {
   public:
    static Operation* createOperation(char c) {
        switch (c) {
            case '+':
                return new AddOperation;
                break;
            case '-':
                return new SubOperation;
                break;
            case '*':
                return new MulOperation;
                break;
            case '/':
                return new DivOperation;
                break;
        }
    }
};
int main() {
    Operation* operation = OperatorFactory::createOperation('+');
    operation->m_leftVlaue = 1;
    operation->m_rightValue = 2;
    cout << operation->GetResult() << endl;
    return 0;
}

工厂模式实现代码:

#include 
using namespace std;
class AbstractProduct {
   public:
    virtual void makeProduct() = 0;
};

class AbstractFactory {
   public:
    virtual AbstractProduct* createProduct() = 0;
};

class PlaneProduct : public AbstractProduct {
   public:
    void makeProduct() { cout << "造飞机....." << endl; }
};
class PlaneFactory : public AbstractFactory {
   public:
    AbstractProduct* createProduct() {
        AbstractProduct* product = new PlaneProduct;
        return product;
    }
};
class RocketProduct : public AbstractProduct {
   public:
    void makeProduct() { cout << "造火箭...." << endl; }
};
class RocketFactory : public AbstractFactory {
   public:
    AbstractProduct* createProduct() {
        AbstractProduct* product = new RocketProduct;
        return product;
    }
};

int main() {
    //造飞机
    AbstractFactory* factory = new PlaneFactory;
    AbstractProduct* product = factory->createProduct();
    product->makeProduct();
    //造火箭
    factory = new RocketFactory;
    product = factory->createProduct();
    product->makeProduct();

    return 0;
}