c++设计模式之观察者模式

视频地址：

https://www.ixigua.com/6804249883344634380?id=6803643021414892046

文档整理地址：

http://t.csdn.cn/1ruUO

  1 #include<iostream>
  2 #include <algorithm>
  3 #include <string>
  4 #include <list>
  5 #include <memory>
  6 using namespace  std;
  7 
  8 enum class  Position
  9 {
 10     CPP,
 11     JAVA,
 12     PHP,
 13     C_Sharp,
 14     Python
 15 };
 16 
 17 class Engineer
 18 {
 19 public:
 20     Engineer(const string &name) :name_(name) {};
 21     virtual void update(Position position) = 0;
 22 protected:
 23     string name_;
 24 
 25 };
 26 
 27 class CppEngineer:public Engineer
 28 {
 29 public:
 30     CppEngineer(const string &name) :Engineer(name) {};
 31     virtual void update(Position position)override
 32     {
 33         if (position == Position::CPP)
 34         {
 35             cout << name_ << " 投递简历!" << endl;
 36         }
 37     }
 38 };
 39 
 40 class PHPEngineer :public Engineer
 41 {
 42 public:
 43     PHPEngineer(const string&name) :Engineer(name) {};
 44     virtual void update(Position position)override
 45     {
 46         if (position == Position::PHP)
 47         {
 48             cout << name_ << " 投递简历!" << endl;
 49         }
 50     }
 51 };
 52 
 53 class JAVAEngineer :public Engineer
 54 {
 55 public:
 56     JAVAEngineer(const string&name) :Engineer(name) {};
 57     virtual void update(Position position)override
 58     {
 59         if (position == Position::JAVA)
 60         {
 61             cout << name_ << " 投递简历!" << endl;
 62         }
 63     }
 64 };
 65 
 66 
 67 
 68 class Alibaba
 69 {
 70 public:
 71     void  Recruit(Position position)                //招聘某种职位
 72     {
 73         Notify(position);
 74     }
 75     void AddEngineer(shared_ptr<Engineer> engineer)
 76     {
 77         engineer_list.push_back(engineer);
 78     }
 79 private:
 80     list<shared_ptr<Engineer>> engineer_list;
 81     void Notify(Position position)                //通知
 82     {
 83         for (const auto &engineer : engineer_list)
 84         {
 85             engineer->update(position);
 86         }
 87     }
 88 };
 89 
 90 int main()
 91 {
 92     Alibaba ali;
 93     ali.AddEngineer(make_shared<CppEngineer>("C++程序员"));
 94     ali.AddEngineer(make_shared<JAVAEngineer>("Java程序员"));
 95     ali.AddEngineer(make_shared<PHPEngineer>("PHP程序员"));
 96 
 97     ali.Recruit(Position::CPP);
 98     ali.Recruit(Position::Python);
 99     ali.Recruit(Position::C_Sharp);
100     ali.Recruit(Position::PHP);
101 }

 

 

 

 

 

观察者模式：

 

标签：include,name,ali,观察者,c++,position,Position,设计模式,engineer
来源： https://www.cnblogs.com/MGFangel/p/16283096.html