void print_char(char c)
{
  char s[2];

  s[0] = c;
  s[1] = '\0';

  print_string(s);
}

void myprintf(char *fmt, ...)
{
  int i, argc = 0;
  char * s;

  while (*fmt){
    if (*fmt == '%'){
      fmt++;
      argc++;
      switch (*fmt){
      case 'd':
        i = *((int*) ((char *)&fmt + argc * sizeof(void *)) );
        print_int(i);
        break;
      case 's':
        s = *((char **)((char *)&fmt + argc * sizeof(void *)));
        print_string(s);
        break;
      }
    } else {
      print_char(*fmt);
    }
    fmt++;
  }
}

int main()
{
  myprintf("TEST %d is %s ...\n", 99, "OK");
  print_string("All done\n");
  return 0;
}