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  1. #include<iostream>
  2. #include<vector>
  3.  
  4. struct IObject
  5.     {
  6.         virtual ~IObject(){}
  7.         virtual IObject* Clone()=0;
  8.         virtual void Work()=0;
  9.     };
  10.  
  11.     struct Concrete_Object1: IObject
  12.     {
  13.         virtual ~Concrete_Object1(){ std::cout<<"Concrete_Object1: destroyed\n";  }
  14.         virtual Concrete_Object1* Clone() { return new Concrete_Object1(*this); }
  15.         virtual void Work(){ std::cout<<"Concrete_Object1: working\n"; }
  16.     };
  17.     struct Concrete_Object2: IObject
  18.     {
  19.         virtual ~Concrete_Object2(){ std::cout<<"Concrete_Object2: destroyed\n";  }
  20.         virtual Concrete_Object2* Clone() { return new Concrete_Object2(*this); }
  21.         virtual void Work(){ std::cout<<"Concrete_Object2: working\n"; }
  22.     };    
  23.  
  24.  
  25.     struct Manager
  26.     {
  27.         ~Manager()
  28.         {
  29.             const size_t size = mObj.size();
  30.             for(size_t n=0;n<size;++n){ delete mObj[n]; mObj[n] = 0l; }
  31.         }
  32.  
  33.         void Connect(IObject* src){  mObj.push_back( src->Clone() ); }
  34.  
  35.         void Work()
  36.         {
  37.             const size_t size = mObj.size();
  38.             for(size_t n=0;n<size;++n){ mObj[n]->Work(); }
  39.         }
  40.         std::vector<IObject*> mObj;
  41.     };
  42.  
  43.  
  44. int main()
  45. {
  46.    Manager man;
  47.    IObject* agent1 = new Concrete_Object1();
  48.    IObject* agent2 = new Concrete_Object2();
  49.  
  50.    man.Connect(agent1);
  51.    man.Connect(agent2);
  52.  
  53.    delete agent1;
  54.    delete agent2;
  55.  
  56.    man.Work();
  57.  
  58.    return 0;
  59. }
Success #stdin #stdout 0.02s 2816KB
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stdin
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Standard input is empty
stdout
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Concrete_Object1: destroyed
Concrete_Object2: destroyed
Concrete_Object1: working
Concrete_Object2: working
Concrete_Object1: destroyed
Concrete_Object2: destroyed
https://ideone.com/tsEQTL
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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