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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. #pragma pack(push)
  5. #pragma pack(4)
  6. typedef struct _B
  7. {
  8. char a, b, c;
  9. }B;
  10. #pragma pack(pop)
  11.  
  12. int main()
  13. {
  14. cout << sizeof(_B) << endl;
  15. cout << sizeof(B) << endl;
  16. return(0);
  17. }
Success #stdin #stdout 0s 3296KB
stdin
Standard input is empty
stdout
3
3