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copy 
  1. #include <stdio.h>
  2.  
  3. int copy(void *p_data) {
  4.     p_data = (void *)(0xffffffff); // для теста
  5. }
  6.  
  7. int ref(void **pp_data) {
  8.     (*pp_data) = (void *)(0xffffffff); // для теста
  9. }
  10.  
  11. int main(void) {
  12.     void *p_data = NULL;
  13.  
  14.     copy(p_data);
  15.     printf("copy value is: %p\n", p_data);
  16.  
  17.     ref(&p_data);
  18.     printf("ref value is: %p\n", p_data);
  19. }
  20.  
Success #stdin #stdout 0s 4168KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
copy value is: (nil)
ref value is: 0xffffffff
https://ideone.com/0DTcjC
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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