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