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  1. #include <iostream>
  2.  
  3. class Alignemnt{
  4. public:
  5.     Alignemnt():a(){}
  6.     int a;
  7. };
  8.  
  9. class Alignemnt_1{
  10. public:
  11.     int a;
  12.     char array[2];
  13. };
  14.  
  15. class Alignemnt_2{
  16. public:
  17.     int a;
  18.     char array[2];
  19.     int x;
  20. };
  21.  
  22. class Alignemnt_3{
  23. public:
  24.     alignas(8) int a;
  25.     char array[2];
  26.     alignas(8) int x;
  27. };
  28.  
  29. class alignas(8) Alignemnt_4{
  30. public:
  31.     int a;
  32.     char array[2];
  33.    int x;
  34. };
  35.  
  36. int main() {
  37. 	std::cout <<  "Sizeof(Alignemnt)   :" <<sizeof(Alignemnt) << std::endl;
  38. 	std::cout <<  "Sizeof(Alignemnt_1) :" <<sizeof(Alignemnt_1) << std::endl;
  39. 	std::cout <<  "Sizeof(Alignemnt_2) :" <<sizeof(Alignemnt_2) << std::endl;
  40. 	std::cout <<  "Sizeof(Alignemnt_3) :" <<sizeof(Alignemnt_3) << std::endl;
  41. 	std::cout <<  "Sizeof(Alignemnt_4) :" <<sizeof(Alignemnt_4) << std::endl;
  42. }
Success #stdin #stdout 0s 3140KB
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stdin
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Standard input is empty
stdout
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Sizeof(Alignemnt)   :4
Sizeof(Alignemnt_1) :8
Sizeof(Alignemnt_2) :12
Sizeof(Alignemnt_3) :16
Sizeof(Alignemnt_4) :16
https://ideone.com/FcqqZx
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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