Convert Arabic number to Chinese

toChineseNumer.m

#define CHAR_MAX 32

NSString* toChineseNumer(NSUInteger num){
  static NSString *cnums = @"〇一二三四五六七八九";
  
  unichar ch[32];
  int i = 0;
  
  do ch[i++] = [cnums characterAtIndex:num%10];
  while ((num /= 10) > 0);
  
  unichar *reverse = calloc(sizeof(unichar), i);
  for (int j=0; j<i; j++) reverse[j] = ch[i-j-1];
  
  NSString *ret = [[NSString alloc] initWithCharacters:reverse length:i];
  free(reverse);
  
  return [ret autorelease];
}