#include <malloc.h>

/* ./a.out && echo $? */
int main(void)
{
char **A;
int i;

A = (char **)malloc(10 * sizeof(char *));
if(!A) return 1;
for(i = 0; i < 10; i++){
  *(A + i) = (char *) malloc(10);
  if(!*(A + i)) return 2;
}

/******/

A = (char **)realloc(A, 15 * sizeof(char *));
if(!A) return 3;
for(i = 10; i < 15; i++){
  *(A + i) = (char *) malloc(10);
  if(!*(A + i)) return 4;
}

/******/
for (i = 0; i < 15; i++) free(*(A + i));
free(A);

return 123; /* everything ok */
}