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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. typedef struct MainStruct {
  5.  
  6.     struct SubStruct1 {
  7.         int x;
  8.         int y;
  9.         int Value;
  10.     } s1;
  11.  
  12.     struct SubStruct2 {
  13.         int y;
  14.         int Value;
  15.         int x;
  16.     } s2;
  17.  
  18.     struct SubStruct3 {
  19.         int Value;
  20.         int x;
  21.         int y;
  22.     } s3;
  23.  
  24. } MainStruct_t;
  25.  
  26. typedef union {
  27.     struct SubStruct1 *s1;
  28.     struct SubStruct2 *s2;
  29.     struct SubStruct3 *s3;
  30.     int Value;
  31. } T;
  32.  
  33. void setValue( T **t, int i )
  34. {
  35.   (*t)->Value=i;
  36. }
  37.  
  38. int main()
  39. {
  40.     MainStruct_t x;
  41.     T t;
  42.  
  43.     setValue( (t.s1=&x.s1,&t), 1);
  44.     setValue( (t.s2=&x.s2,&t), 2);
  45.     setValue( (t.s3=&x.s3,&t), 3);
  46.  
  47.     printf( "%d %d %d",x.s1.Value,x.s2.Value,x.s3.Value);
  48.  
  49.     return 0;
  50. }
Success #stdin #stdout 0s 2156KB
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47 134513954 3
https://ideone.com/I9Wqg3
language:
C (gcc 8.3)
created:
10 years ago
visibility:
secret

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