遍历操作模板

for (std::list<char*>::iterator iterator_condition_columns = 
              condition_columns.begin();;){
    begin_offset += sprintf(condition_begin_limit_rows + begin_offset, "%s asc", 
                                                *iterator_condition_columns);
    end_offset += sprintf(condition_end_limit_rows + end_offset, "%s desc", 
                                                *iterator_condition_columns);
    if ((++iterator_condition_columns) == condition_columns.end()){
      return TRUE;
    }
    begin_offset += sprintf(condition_begin_limit_rows + begin_offset, ",");
    end_offset += sprintf(condition_end_limit_rows + end_offset, ",");
  }