fork download 
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. typedef unsigned char u8;
  6. typedef unsigned int u32;
  7.  
  8. class Test {
  9.     u8 four_bit_field : 4;
  10.     u8 eight_bit_field;
  11.     u32 twenty_bit_field : 20;
  12. }__attribute__((packed));
  13.  
  14. class Test2 {
  15.     u8 four_bit_field : 4;
  16.     u8 eight_bit_field : 8;
  17.     u32 twenty_bit_field : 20;
  18. }__attribute__((packed));
  19.  
  20. int main()
  21. {
  22.     cout << sizeof(Test) << endl;
  23.     cout << sizeof(Test2) << endl;
  24. }
Success #stdin #stdout 0s 2852KB
comments (?)
stdin 
Standard input is empty
stdout 
5
4
https://ideone.com/Bexw6l
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!