# coding=utf-8max_length = 100
success = 1
fail = 0
error = -1
class queue(object):
stack_fir = none
stack_sec = none
queue_len = 0
def __init__(self):
self.stack_fir = stack()
self.stack_sec = stack()
self.queue_len = 0
# 佇列push方法
def push(self, item):
if self.queue_len == max_length:
return result(fail, none)
elif self.queue_len > max_length:
return result(error, none)
self.queue_len += 1
result = self.stack_fir.push(item)
if result.get_code() == success:
return result(success, none)
else:
return result(fail, none)
# 佇列pop方法
def pop(self):
if self.queue_len == 0:
return result(fail, none)
elif self.queue_len < 0:
return result(error, none)
self.queue_len -= 1
# 將裝有資料的棧拷貝到空棧中
while self.stack_fir.has_next():
pop_result = self.stack_fir.pop()
if pop_result.get_code() == success:
self.stack_sec.push(pop_result.get_value())
result = self.stack_sec.pop().get_value()
# 將裝有資料的棧拷貝到空棧中
while self.stack_sec.has_next():
pop_result = self.stack_sec.pop()
if pop_result.get_code() == success:
self.stack_fir.push(pop_result.get_value())
return result(success, result)
# 佇列是否有下乙個元素
def has_next(self):
return self.queue_len > 0
class stack(object):
stack_len = 0
item_list =
def __init__(self):
self.stack_len = 0
self.item_list =
# 棧push方法
def push(self, item):
if self.stack_len == max_length:
return result(fail, none)
elif self.stack_len > max_length:
return result(error, none)
self.stack_len += 1
return result(success, none)
# 棧pop方法
def pop(self):
if self.stack_len == 0:
return result(fail, none)
elif self.stack_len < 0:
return result(error, none)
self.stack_len -= 1
item = self.item_list[self.stack_len]
del self.item_list[self.stack_len]
return result(success, item)
# 棧是否有下乙個元素
def has_next(self):
return self.stack_len > 0
class result(object):
code = 0
value = none
def __init__(self, code, value):
self.code = code
self.value = value
def get_code(self):
return self.code
def get_value(self):
return self.value
if __name__ == '__main__':
queue = queue()
queue.push(1)
queue.push(2)
queue.push(5)
queue.push(4)
queue.push(3)
while queue.has_next():
print queue.pop().get_value()
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