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  1. #include <stdio.h>
  2.  
  3. typedef struct elem {
  4.     void * d;
  5. } Elem;
  6.  
  7. int main() {
  8.     Elem *p = &(struct elem) { .d = NULL }; //malloc(sizeof(Elem));
  9.     Elem e;
  10.  
  11.     double pi = 3.14;
  12.     e.d = &pi;
  13.     p->d = &pi;
  14.  
  15.     printf("%f\n", *((double *)p->d));
  16.     printf("%f\n", *((double *)e.d));
  17.     return 0;
  18. }
Success #stdin #stdout 0s 2112KB
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stdin
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Standard input is empty
stdout
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3.140000
3.140000
https://ideone.com/Rvpsau
language:
C99 (gcc 8.3)
created:
8 years ago
visibility:
secret

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