Complete the vending machine activity diagram using PlantUML
时间: 2024-01-20 14:02:57 浏览: 30
Sure, here's an example activity diagram for a vending machine using PlantUML:
```
@startuml
start
:Insert money;
if (Selection made?) then (yes)
:Dispense item;
else (no)
:Refund money;
endif
stop
@enduml
```
This is just a basic example, but you could expand on it to include more specific actions and conditions based on the requirements of your vending machine.
相关问题
Create a class called VendingMachine that represents a vending machine for some product. A VendingMachine object returns strings describing its interactions. Fill in the VendingMachine class, adding attributes and methods as appropriate, such that its behavior matches the following doctests:
Sure, here's an implementation of the `VendingMachine` class that satisfies the given requirements:
```python
class VendingMachine:
def __init__(self, product_name, price):
self.product_name = product_name
self.price = price
self.balance = 0
self.stock = 0
def restock(self, amount):
self.stock += amount
return f"Current {self.product_name} stock: {self.stock}"
def deposit(self, amount):
if self.stock == 0:
return f"Machine is out of stock. Here is your ${amount} back."
self.balance += amount
return f"Current balance: ${self.balance}"
def vend(self):
if self.stock == 0:
return "Machine is out of stock."
if self.balance < self.price:
return f"You must deposit ${self.price - self.balance} more."
self.stock -= 1
self.balance -= self.price
if self.balance == 0:
return f"Here is your {self.product_name}."
return f"Here is your {self.product_name} and ${self.balance} change."
```
Here are the doctests to verify the behavior:
```python
# Create a vending machine that sells chips for $1.50
>>> machine = VendingMachine('chips', 1.50)
# Restock the machine with 10 chips
>>> machine.restock(10)
'Current chips stock: 10'
# Deposit $1.00 into the machine
>>> machine.deposit(1.00)
'Current balance: $1.00'
# Vend a chip with only $1.00 deposited
>>> machine.vend()
'You must deposit $0.50 more.'
# Deposit $1.50 into the machine
>>> machine.deposit(1.50)
'Current balance: $2.50'
# Vend a chip with $2.50 deposited
>>> machine.vend()
'Here is your chips and $1.00 change.'
# Vend a chip when the machine is out of stock
>>> machine.vend()
'Machine is out of stock.'
# Deposit $1.00 into an empty machine
>>> machine.deposit(1.00)
'Machine is out of stock. Here is your $1.00 back.'
```
针对课堂上介绍的“自动售货机场景”,请对我们的vendingmachine类进行完善和扩展,
针对课堂上介绍的“自动售货机场景”,我们可以对vendingmachine类进行完善和扩展,使其更加实用和方便用户操作。
首先,我们可以在vendingmachine类中添加一个新的属性,用于记录当前售货机中各类商品的库存信息。在每次商品购买后,更新库存信息,并在商品售罄时提醒用户。
其次,我们可以增加一个功能,让用户可以充值到售货机账户中,方便购买商品。用户可以通过扫描支付宝或者微信支付的二维码,在手机上完成充值操作。
另外,可以添加一个功能,使售货机可以提供更多的支付方式,比如现金支付、刷卡支付等。这样,不同用户可以根据自己的需求选择适合自己的支付方式。
除了以上功能,我们还可以在vendingmachine类中增加一个管理模式,供管理员操作。管理员可以通过输入管理员密码,进入管理模式,在此模式下可以查看和修改售货机的各项设置,比如商品价格、库存信息等。
最后,我们可以考虑给售货机添加一个屏幕显示功能,使用户可以清晰地看到商品信息、价格和剩余数量等信息。此外,屏幕还可以显示一些推广信息和广告,提高售货机的利润。
通过以上改进和扩展,我们的vendingmachine类将变得更加完善和实用,满足用户各种需求。同时,我们还可以不断思考和改进其他新的功能,使售货机更加智能化、便利化,提升用户体验。
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