int main(int argc, char **argv)
{
   (void)argc;
   (void)argv;
   int i;
   char *newstr;
   printf("v=%d\n", i);
   printf("v as string: %s\n", newstr);
   free(newstr); 
   const char *s;
   printf("v=%s (pointer: %p)\n", s, s);
   printf("v as string: %s (pointer: %p)\n", newstr, newstr);
   free(newstr); 
   
   printf("otherv=%s\n", s);
   
   printf("v=%d\n", i);
}