设计模式之工厂模式（大话设计模式C++实现）

小鱼儿 2022-09-10 11:23 223阅读 0赞

类图如下：

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAemhhbmdodWFpY2hhbw_size_20_color_FFFFFF_t_70_g_se_x_16][]

代码实现如下：最近时间比较忙，后期考虑上传到github上。

#include<iostream>
    #include<string>
    using namespace std;
    
    
    class Operation{
    public:
        virtual double getResult()=0;
        void SetNumberA(double value){
            NumberA = value;
        }
        void SetNumberB(double value){
            NumberB = value;
        }
    protected:
        double NumberA;
        double NumberB;
    };
    
    class abstractFatory{
    public:
        virtual Operation* createOperation()=0;
    };
    
    
    
    class addOperation:public Operation{
    public:
        double getResult(){
            return NumberA+NumberB;
        }
    };
    
    class addFactory:public abstractFatory{
    public:
        Operation* createOperation(){
            return  new addOperation;
        }
    };
    
    class subOperation:public Operation{
    public:
        double getResult(){
            return NumberA-NumberB;
        }
    };
    
    class subFactory:public abstractFatory{
    public:
        Operation* createOperation(){
            return  new subOperation;
        }
    };
    
    class mulOperation:public Operation{
    public:
        double getResult(){
            return NumberA*NumberB;
        }
    };
    
    class mulFactory:public abstractFatory{
    public:
        Operation* createOperation(){
            return  new mulOperation;
        }
    };
    
    class divOperation:public Operation{
    public:
        double getResult(){
            return NumberA/NumberB;
        }
    };
    
    class divFactory:public abstractFatory{
    public:
        Operation* createOperation(){
            return  new divOperation;
        }
    };
    
    
    int main(){
    
        abstractFatory* factory=new divFactory;
        Operation* operation=factory->createOperation();
        operation->SetNumberA(16);
        operation->SetNumberB(8);
        std::cout<<operation->getResult()<<std::endl;
    
    }

[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAemhhbmdodWFpY2hhbw_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220829/84d3aeb40707409d867218ef9faeac9a.png