#coding=utf-8
book_list=[] #图书馆所有书
unborrowed_book=[] #可借阅的书
borrowed_book=[] #已经借出去的书
def add(): #添加书
global book_list
global unborrowed_book
book_name=raw_input(u"请输入要添加的书名：".encode("gbk"))
book_list.append(book_name)
unborrowed_book.append(book_name)
print u"添加书成功"
def borrow_book(): #借书
global unborrowed_book
global borrowed_book
while 1:
book_name=raw_input(u"请输入要借的书名：".encode("gbk"))
if book_name in unborrowed_book:
unborrowed_book.remove(book_name)
borrowed_book.append(book_name)
print u"借书成功"
break
else:
print u"抱歉，您要借的书不存在!"
continue_back=raw_input(u"继续借书请输入：c 返回主菜单请输入：b ：".encode("gbk"))
if continue_back.lower()=="c":
continue
elif continue_back.lower()=="b":
break
else:
print u"输入数据无效"
def return_book(): #还书
global borrowed_book
global unborrowed_book
while 1:
book_name=raw_input(u"请输入要还的书名：".encode("gbk"))
if book_name in borrowed_book:
borrowed_book.remove(book_name)
unborrowed_book.append(book_name)
print u"还书成功"
break
else:
print u"您输入的书名不是此图书馆的"
continue_back=raw_input(u"继续还书请输入：c 返回主菜单请输入：b ：".encode("gbk"))
if continue_back.lower()=="c":
continue
elif continue_back.lower()=="b":
break
else:
print u"输入数据无效"
menu_info='''
添加书--请输入：1
借书--请输入：2
查看可借阅的书--请输入：3
查看借出去的书--请输入：4
还书--请输入：5
查看所有书--请输入：6
退出--请输入：q
'''
import sys
print menu_info.decode("utf-8")
while True:
command=raw_input(u"请输入您要做的操作选项：".encode("gbk"))
if command=="1":
add()
elif command=="2":
borrow_book()
elif command=="3":
if unborrowed_book==[]:
print u"抱歉，没有可以借的书了!"
else:
print u"可借阅的书：",unborrowed_book
elif command=="4":
if borrowed_book==[]:
print u"没有借出去的书！"
else:
print u"借出去的书：",borrowed_book
elif command=="5":
return_book()
elif command=="6":
if book_list==[]:
print u"图书馆还没有书，赶快去添加吧！"
else:
print u"图书馆所有的书：",book_list
elif command=="q":
sys.exit()
else:
print u"输入数据无效！"