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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class A
  5.   {
  6.   };
  7.  
  8. class B:public A
  9.   {
  10.    public:
  11.    B() { cout<<"B"<<endl; }
  12.   };
  13.  
  14. class C:public A
  15.   {
  16.    public:
  17.    C() { cout<<"C"<<endl; }
  18.   };
  19.  
  20. class D:public C
  21.   {
  22.    public:
  23.    D() { cout<<"D"<<endl; }
  24.   };
  25.  
  26. typedef A *creator();
  27. creator *Tb[]=
  28.   {
  29.    [] () -> A* { return new B(); },
  30.    [] () -> A* { return new C(); },
  31.    [] () -> A* { return new D(); }
  32.   };
  33.  
  34. int main()
  35.   {
  36.    A *b=Tb[0](); 
  37.    A *c=Tb[1]();
  38.    A *d=Tb[2]();
  39.    delete b;
  40.    delete c;
  41.    delete d;
  42.    return 0;
  43.   }
Success #stdin #stdout 0s 3472KB
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stdin
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Standard input is empty
stdout
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B
C
C
D
https://ideone.com/hKlfF1
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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