public void student_menu(Member loginmem) throws Exception{
		int stu_menu;
		System.out.println("------------------------------");
		System.out.println("1.  ˻");
		System.out.println("2.  뿩 ");
		System.out.println("3. α׾ƿ");
		System.out.println("------------------------------");
		System.out.print("޴ Է:");
		stu_menu = scan.nextInt();

		switch(stu_menu){
		case 1:
			book_search(loginmem);
			break;
		case 2:
			book_borrowinfo(loginmem);
			break;
		case 3:
			stu_logout(loginmem);
			break;
		}
	}