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  1. #include <stdio.h>
  2. #include <stdbool.h>
  3.  
  4. struct test{
  5.  
  6.        bool opaque                 : 1;
  7.        unsigned int fill_color     : 3;
  8.        unsigned int                : 4;
  9.        bool show_border            : 1;
  10.        unsigned int border_color   : 3;
  11.        unsigned int border_style   : 2;
  12.        unsigned int                : 2;
  13. };
  14.  
  15.  
  16. int main(void)
  17. {
  18.   struct test Test = {0};
  19.   int i;
  20.   printf("%zu\n", sizeof(Test));
  21.  
  22.   unsigned char* p;
  23.   p = (unsigned char*)&Test;
  24.   for(i=0; i<sizeof(Test); ++i)
  25.   {
  26.     printf("%02x", *p);
  27.     ++p;
  28.   }
  29.   printf("\n");
  30.  
  31.   Test.opaque = true;
  32.  
  33.   p = (unsigned char*)&Test;
  34.   for(i=0; i<sizeof(Test); ++i)
  35.   {
  36.     printf("%02x", *p);
  37.     ++p;
  38.   }
  39.   printf("\n");
  40.  
  41.   Test.fill_color = 3;
  42.  
  43.   p = (unsigned char*)&Test;
  44.   for(i=0; i<sizeof(Test); ++i)
  45.   {
  46.     printf("%02x", *p);
  47.     ++p;
  48.   }
  49.   printf("\n");
  50.  
  51.   return 0;
  52. }
  53.  
Success #stdin #stdout 0s 4264KB
comments (?)
stdin
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Standard input is empty
stdout
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4
00000000
01000000
07000000
https://ideone.com/wbR5tI
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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