#coding=utf-8
book_list=[] #圖書館所有書
unborrowed_book=[] #可借閱的書
borrowed_book=[] #已經借出去的書
def add(): #添加書
global book_list
global unborrowed_book
book_name=raw_input(u"請輸入要添加的書名：".encode("gbk"))
book_list.append(book_name)
unborrowed_book.append(book_name)
print u"添加書成功"
def borrow_book(): #借書
global unborrowed_book
global borrowed_book
while 1:
book_name=raw_input(u"請輸入要借的書名：".encode("gbk"))
if book_name in unborrowed_book:
unborrowed_book.remove(book_name)
borrowed_book.append(book_name)
print u"借書成功"
break
else:
print u"抱歉，您要借的書不存在!"
continue_back=raw_input(u"繼續借書請輸入：c 返回主菜單請輸入：b ：".encode("gbk"))
if continue_back.lower()=="c":
continue
elif continue_back.lower()=="b":
break
else:
print u"輸入數據無效"
def return_book(): #還書
global borrowed_book
global unborrowed_book
while 1:
book_name=raw_input(u"請輸入要還的書名：".encode("gbk"))
if book_name in borrowed_book:
borrowed_book.remove(book_name)
unborrowed_book.append(book_name)
print u"還書成功"
break
else:
print u"您輸入的書名不是此圖書館的"
continue_back=raw_input(u"繼續還書請輸入：c 返回主菜單請輸入：b ：".encode("gbk"))
if continue_back.lower()=="c":
continue
elif continue_back.lower()=="b":
break
else:
print u"輸入數據無效"
menu_info='''
添加書--請輸入：1
借書--請輸入：2
查看可借閱的書--請輸入：3
查看借出去的書--請輸入：4
還書--請輸入：5
查看所有書--請輸入：6
退出--請輸入：q
'''
import sys
print menu_info.decode("utf-8")
while True:
command=raw_input(u"請輸入您要做的操作選項：".encode("gbk"))
if command=="1":
add()
elif command=="2":
borrow_book()
elif command=="3":
if unborrowed_book==[]:
print u"抱歉，沒有可以借的書了!"
else:
print u"可借閱的書：",unborrowed_book
elif command=="4":
if borrowed_book==[]:
print u"沒有借出去的書！"
else:
print u"借出去的書：",borrowed_book
elif command=="5":
return_book()
elif command=="6":
if book_list==[]:
print u"圖書館還沒有書，趕快去添加吧！"
else:
print u"圖書館所有的書：",book_list
elif command=="q":
sys.exit()
else:
print u"輸入數據無效！"