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  1. #include <iostream>
  2. #include <memory>
  3.  
  4. class speziell {
  5.   struct allg {
  6.     virtual double get() =0;
  7.   };
  8.   struct einfach0 : allg {
  9.     double get() { return 0.0; }
  10.   };
  11.   struct interpoliert : allg {
  12.     interpoliert(double x) : x(x) {}
  13.     double x;
  14.     double get() { return x; }
  15.   };
  16.   std::unique_ptr<allg> data;
  17. public:
  18.   speziell() : data(new einfach0) {}
  19.   speziell(double x) : data(new interpoliert(x)) {}
  20.  
  21.   double get() { return data->get(); }
  22. };
  23.  
  24. int main()
  25. {
  26.   speziell a;
  27.   speziell b(4.0);
  28.  
  29.   std::cout << a.get() << ' ' << b.get() << std::endl;
  30. }
  31.  
Success #stdin #stdout 0s 3472KB
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https://ideone.com/HV5Drc
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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