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  1. #include <stdlib.h>
  2. #include <stdio.h>
  3. #include <string.h>
  4.  
  5. typedef struct
  6. {
  7.   int field;
  8. } myStruct;
  9.  
  10. void myFunc(myStruct *ptr)
  11. {
  12.   if (ptr == NULL)
  13.   {
  14.     printf("Pointer is null!");
  15.   }
  16.   // rest of code
  17. }
  18.  
  19. int main()
  20. {
  21.   myStruct *ptr = NULL; // tried both *ptr; and *ptr = NULL;
  22.   memset(&ptr, 0, sizeof(ptr));
  23.   myFunc(ptr);
  24.   return 0;
  25. }
  26.  
Success #stdin #stdout 0s 9432KB
comments ()
stdin 
Standard input is empty
stdout 
Pointer is null!
https://ideone.com/SwxaKv
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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