switch (today){
           case '一':
           case '三':
           case '五':
          
         System.out.printIn("吃包子");
         break;
         case '二':
         case '四':
         case '六':
        
         System.out.printIn("吃油条");
         break;
        default:
         System.out.printIn("吃主席套餐");
        
           
        }