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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. struct A
  6. {
  7.   int x;
  8.   A(int x) : x(x) {}
  9. };
  10.  
  11. struct B : A
  12. {
  13.   B() : A(7) {}
  14.   // int y; // if uncomment, program vouldn't compile
  15. };
  16.  
  17. static_assert(sizeof (A) == sizeof (B), "B must have same size as A");
  18.  
  19. int main()
  20. {
  21.   A *a = new B[4];
  22.  
  23.   for (size_t q=0; q<4; ++q)
  24.     cout << q << ": " << a[q].x << endl;
  25.  
  26.   delete [] a;
  27.  
  28.   return 0;
  29. }
Success #stdin #stdout 0s 4372KB
comments (?)
stdin 
Standard input is empty
stdout 
0: 7
1: 7
2: 7
3: 7
https://ideone.com/iSkJk0
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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