题目如下:
python实现:
class DLNode:
def __init__(self,data):
self.data = data
self.next = None
self.prev = None
class DLL:
def __init__(self):
self.head = DLNode(None)
def CreateDLL(self):
DataList = [1,2,3,4,5,6,7,8,9,10]
cNode = self.head
for i in range(1,11):
element = DLNode(i)
cNode.next = element
element.prev = cNode
cNode = cNode.next
def PageTurning(self):
cNode = self.head.next
print("当前所在页码为:",cNode.data,"不要向前翻啦!")
order = input("请输入操作(其中N代表向后翻页,P代表向前翻页,Q代表退出程序):")
while(order!= 'Q'):
if order== 'N':
if cNode.next == None:
print("已经是最后一页啦!")
else :
cNode = cNode.next
print("当前所在页码为:",cNode.data)
elif order== 'P':
if cNode.prev == self.head:
print("亲,回不去了!")
else :
cNode = cNode.prev
print("当前所在页码为:",cNode.data)
else:
print("输入是错的哦,请再来一次!")
order = input("请输入操作(其中N代表向后翻页,P代表向前翻页,Q代表退出程序):")
D2L = DLL()
D2L.CreateDLL()
D2L.PageTurning()
结果如下: