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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int function(char **data) {
  5.     char data_new[542] = "bar";
  6.     data_new[541] = 'Z';
  7.     *data = realloc(*data, 542);
  8.     memcpy(*data, data_new, sizeof(data_new));
  9.     return 1;
  10. }
  11.  
  12. int main(void) {
  13.     char *foo = malloc(200);
  14.     function(&foo);
  15.     printf("%c%c%c ... %c\n", foo[0], foo[1], foo[2], foo[541]);
  16.     free(foo);
  17. 	return 0;
  18. }
  19.  
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
Standard input is empty
stdout 
bar ... Z
https://ideone.com/v10p2S
realloc pointer to pointer
language:
C (gcc 8.3)
created:
305 days ago
visibility:
secret

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