public class HelloWorld {

    public static void main(String[] args) {

char today='日';

switch(today)

{case ('一'||'三'||'五'):

    System.out.println("吃包子");

case('二'||'四'||'六'):

System.out.println("吃油条");

default:

System.out.println("吃主席套餐");}

}

}