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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. #pragma pack(push, 16)
  5. struct Foo {
  6.     int a;
  7. };
  8. #pragma pack(pop)
  9.  
  10. struct Foo1 { 
  11.     int a; 
  12. } __attribute__((aligned(16)));
  13.  
  14. struct alignas(16) Foo2 {    
  15.     int a;
  16. };
  17.  
  18. int main() {
  19. 	cout << "sizeof(struct Foo) = " << sizeof(struct Foo) << endl;
  20. 	cout << "sizeof(struct Foo1) = " << sizeof(struct Foo1) << endl;
  21. 	cout << "sizeof(struct Foo2) = " << sizeof(struct Foo2) << endl;
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 3456KB
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stdin
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Standard input is empty
stdout
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sizeof(struct Foo) = 4
sizeof(struct Foo1) = 16
sizeof(struct Foo2) = 16
https://ideone.com/mMFWTX
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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