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  1. #include <stdio.h>
  2.  
  3. #pragma pack (push, 1)
  4. typedef union FLOAT_VIEW
  5. {
  6.     float number;
  7.  
  8.     struct
  9.     {
  10.         unsigned sign : 1;
  11.         unsigned order : 8;
  12.         unsigned mantiss : 23;
  13.     } view;
  14. } FLOAT_VIEW;
  15.  
  16. typedef union DOUBLE_VIEW
  17. {
  18.     double number;
  19.  
  20.     struct
  21.     {
  22.         unsigned long long sign : 1;
  23.         unsigned long long order : 11;
  24.         unsigned long long mantiss : 52;
  25.     } view;
  26. } DOUBLE_VIEW;
  27. #pragma pack (pop)
  28.  
  29. void main()
  30. {
  31.     printf("sizeof(FLOAT_VIEW) = %d\n", sizeof(FLOAT_VIEW));
  32.     printf("sizeof(DOUBLE_VIEW) = %d", sizeof(DOUBLE_VIEW));
  33. }
Runtime error #stdin #stdout 0s 2160KB
comments (?)
stdin 
Standard input is empty
stdout 
sizeof(FLOAT_VIEW) = 4
sizeof(DOUBLE_VIEW) = 8
https://ideone.com/k9xnJD
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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