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  1. #include <iostream>
  2.  
  3. struct A {
  4.   A() {}
  5.   static int n;
  6.   static int increment() { return ++n; }
  7. };
  8. int A::n = 0;
  9.  
  10. struct B : public A {};
  11. struct C : public A {};
  12. struct D : public B, C {};
  13.  
  14. int main() {
  15.   D d;
  16.   std::cout << d.increment() << "\n";
  17.   std::cout << d.increment() << "\n";
  18. }
Success #stdin #stdout 0s 3296KB
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https://ideone.com/4Hollz
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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