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  1. #include <string>
  2. #include <memory>
  3. #include <cassert>
  4. #include <iostream>
  5.  
  6. class A
  7. {
  8. public:
  9.     virtual ~A() = default;
  10.     virtual std::string foo() const
  11.     {
  12.         return "A";
  13.     }
  14. };
  15.  
  16. void testA()
  17. {
  18.     A a;
  19.     assert(a.foo() == "A");
  20. }
  21.  
  22. class B: public A
  23. {
  24. public:
  25.     virtual std::string foo() const
  26.     {
  27.         return "B";
  28.     }
  29. };
  30.  
  31. void testB()
  32. {
  33.     B b;
  34.     assert(b.foo() == "B");
  35. }
  36.  
  37. void real_code()
  38. {
  39.     std::unique_ptr<A> ptr(new B);
  40.     std::cout << ptr->foo() << std::endl;
  41. }
  42.  
  43. int main() {
  44. 	// your code goes here
  45. 	real_code();
  46. 	return 0;
  47. }
Success #stdin #stdout 0s 4200KB
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Standard input is empty
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B
https://ideone.com/cac3Ss
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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