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  1. #include <iostream>
  2. #include <iomanip>
  3.  
  4. using namespace std;
  5.  
  6. struct Widget
  7. {
  8.     int widget;
  9. };
  10.  
  11. struct Button
  12.     : public Widget
  13. {
  14.     int button;
  15. };
  16.  
  17. int main()
  18. {
  19.     cout << "sizeof(int): " << sizeof(int) << endl;
  20.     cout << "sizeof(Button): " << sizeof(Button) << endl;
  21.     Button* b = new Button;
  22.     b->widget = 1;
  23.     b->button = 2;
  24.     int* data = reinterpret_cast<int*>(b);
  25.     for(int i=0; i<sizeof(Button)/sizeof(int); i++)
  26.     {
  27.         cout << "0x" << hex << setfill('0') << setw(2*sizeof(int)) << data[i] << endl;
  28.     }
  29. }
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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sizeof(int): 4
sizeof(Button): 8
0x00000001
0x00000002
https://ideone.com/2Wj0uo
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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