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  1. #include <stdio.h>
  2.  
  3. union my_union
  4. {
  5.    int a;
  6.    struct {
  7.       char b1;
  8.       char b2;
  9.       char b3;
  10.       char b4;
  11.    } b;
  12. };
  13.  
  14. int main()
  15. {
  16.    union my_union x;
  17.  
  18.    x.a = 1000;
  19.  
  20.    printf("x.a = %d\n", x.a);
  21.    printf("x.b.b1 = %d\n", x.b.b1);
  22.    printf("x.b.b2 = %d\n", x.b.b2);
  23.    printf("x.b.b3 = %d\n", x.b.b3);
  24.    printf("x.b.b4 = %d\n", x.b.b4);
  25.  
  26.    printf("%ld\n", sizeof(union my_union));
  27.  
  28.    return 0;
  29. }
  30.  
Success #stdin #stdout 0s 5280KB
comments (?)
stdin
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Standard input is empty
stdout
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x.a = 1000
x.b.b1 = -24
x.b.b2 = 3
x.b.b3 = 0
x.b.b4 = 0
4
https://ideone.com/gufIOu
language:
C (gcc 8.3)
created:
29 days ago
visibility:
public

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