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  1. #include <stdio.h>
  2.  
  3. struct structA_t{
  4.   char* a_one;
  5.   char* a_two;
  6. };
  7.  
  8. struct structB_t{
  9.   char* b_one;
  10.   char* b_two;
  11.   char* b_three;
  12. };
  13.  
  14. struct structC_t{
  15.   char* c_one;
  16.   char* c_two;
  17.   char* c_three;
  18. };
  19.  
  20. typedef enum my_e_dataId{
  21.   dataid_invalid = 0,
  22.   dataid_a,
  23.   dataid_b,
  24.   dataid_c
  25. } my_dataId;
  26.  
  27. typedef union u_data {
  28.   struct structA_t* a;
  29.   struct structB_t* b;
  30.   struct structC_t* c;
  31. }mydata;
  32.  
  33. typedef struct s_some_type{
  34.   my_dataId dataId;
  35.   mydata myData;
  36. }some_type;
  37.  
  38. static struct structA_t a = {"ads", "as"};
  39. static struct structB_t b = {"zzds", "dfr", "shywsd"};
  40. static struct structC_t c = {"ssa", "ad", "dhksdhs"};
  41.  
  42. int main (int argc, char** argv){
  43.   some_type sta[] = {
  44.     {dataid_a, (struct structA_t*) &a},
  45.     {dataid_b, (struct structA_t*) &b},
  46.     {dataid_c, (struct structA_t*) &c}
  47.   };
  48.  
  49.   printf("second field of a: %s\n", sta[0].myData.a->a_two);
  50.   printf("third field of c: %s\n", sta[2].myData.c->c_three);
  51.  
  52.   return 0;
  53. }
Success #stdin #stdout 0.02s 1676KB
comments (?)
stdin
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Standard input is empty
stdout
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second field of a: as
third field of c: dhksdhs
https://ideone.com/fcjuR
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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