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;
            case '日':
            System.out.println("吃主席套餐")；
            break;
            default:
            System.out.println("吃屎去吧");
        }