fork download 
  1.  
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4.  
  5. union instructionSet {
  6.     struct Brane{
  7.         unsigned int opcode: 4;
  8.         unsigned int address: 12;
  9.     } brane;
  10.     struct Cmp{
  11.         unsigned int opcode: 4;
  12.         unsigned int blank: 1;
  13.         unsigned int rsvd: 3;
  14.         unsigned char letter: 8;
  15.     } cmp;
  16.     struct {
  17.         unsigned int rsvd: 16;
  18.     } reserved;
  19. };
  20.  
  21. int main() {
  22.  
  23.     union instructionSet IR;// = (union instructionSet*)calloc(1, 2);
  24.  
  25.     printf("size of union %ld\n", sizeof(union instructionSet));
  26.     printf("size of reserved %ld\n", sizeof(IR.reserved));
  27.     printf("size of brane %ld\n", sizeof(IR.brane));
  28.     printf("size of brane %ld\n", sizeof(IR.cmp));
  29.  
  30.  
  31.     return 0;
  32. }
Success #stdin #stdout 0s 9424KB
comments (?)
stdin 
Standard input is empty
stdout 
size of union 4
size of reserved 4
size of brane 4
size of brane 4
https://ideone.com/NMK3hx
language:
C99 (gcc 8.3)
created:
5 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!