public static void main(String[] args) {
  char today='日';
  switch(today){
      case '一':
      case '三':
      case '五':
          System.out.println("吃包子");
          break;
      case '二':
      case '四':
      case '六':
          System.out.println("吃油条");
          break;
      default:
          System.out.println("主席套餐");