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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. enum SomeState {
  5.     Undefined = -1,
  6.     AllOk = 1,
  7.     SomeStrange1,
  8.     SomeStrange2,
  9. };
  10.  
  11. int main() 
  12. {
  13.     SomeState a;
  14.     std::cout << a << std::endl; // любое значение, может даже 0
  15.  
  16.     SomeState b{};
  17.     std::cout << b << std::endl; // 0!!! Но такого элемента нет
  18.  
  19. 	return 0;
  20. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
0
0
https://ideone.com/XehYqs
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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