Here is a simple implementation in Python:

```python
class Item:
def __init__(self, name, price, quantity, expiration_date):
self.__name = name
self.__price = price
self.__quantity = quantity
self.__expiration_date = expiration_date

def display(self):
print(f"Name: {self.__name}
Price: ${self.__price}
Quantity available: {self.__quantity}
Expiration Date: {self.__expiration_date}")

class Snack(Item):
pass

class Beverage(Item):
def __init__(self, name, price, quantity, expiration_date, volume, type):
super().__init__(name, price, quantity, expiration_date)
self.__volume = volume
self.__type = type

def display(self):
super().display()
print(f"Volume: {self.__volume}
Type: {self.__type}")

class Meal(Item):
def __init__(self, name, price, quantity, expiration_date, ingredients, cooking_time, type):
super().__init__(name, price, quantity, expiration_date)
self.__ingredients = ingredients
self.__cooking_time = cooking_time
self.__type = type

def display(self):
super().display()
print(f"Ingredients: {self.__ingredients}
Cooking Time: {self.__cooking_time} minutes
Type: {self.__type}")

# Sample Input
snack = Snack("Cookies", 1.5, 100, "2024-05-31")
beverage = Beverage("Lemonade", 1.25, 75, "2024-06-15", "16 oz", "Soft Drink")
meal = Meal("Spaghetti", 10.75, 50, "2024-05-20", "Pasta, Tomato Sauce, Meatballs", 45, "Dinner")

# Sample Output
print("Canteen Items Details:")
print("Snack Details:")
snack.display()
print("
Beverage Details:")
beverage.display()
print("
Meal Details:")
meal.display()
```

This code creates a base class `Item` with private attributes for name, price, quantity, and expiration date. It also has a `display` method to print these details. The `Snack`, `Beverage`, and `Meal` classes inherit from `Item` and add their own specific attributes. The `display` method is overridden in `Beverage` and `Meal` to include these additional details. The sample input and output show how to create objects of these classes and display their details.

Question

Here is a simple implementation in Python:

```python
class Item:
    def __init__(self, name, price, quantity, expiration_date):
        self.__name = name
        self.__price = price
        self.__quantity = quantity
        self.__expiration_date = expiration_date

def display(self):
        print(f"Name: {self.__name}
Price: ${self.__price}
Quantity available: {self.__quantity}
Expiration Date: {self.__expiration_date}")

class Snack(Item):
    pass

class Beverage(Item):
    def __init__(self, name, price, quantity, expiration_date, volume, type):
        super().__init__(name, price, quantity, expiration_date)
        self.__volume = volume
        self.__type = type

def display(self):
        super().display()
        print(f"Volume: {self.__volume}
Type: {self.__type}")

class Meal(Item):
    def __init__(self, name, price, quantity, expiration_date, ingredients, cooking_time, type):
        super().__init__(name, price, quantity, expiration_date)
        self.__ingredients = ingredients
        self.__cooking_time = cooking_time
        self.__type = type

def display(self):
        super().display()
        print(f"Ingredients: {self.__ingredients}
Cooking Time: {self.__cooking_time} minutes
Type: {self.__type}")

# Sample Input
snack = Snack("Cookies", 1.5, 100, "2024-05-31")
beverage = Beverage("Lemonade", 1.25, 75, "2024-06-15", "16 oz", "Soft Drink")
meal = Meal("Spaghetti", 10.75, 50, "2024-05-20", "Pasta, Tomato Sauce, Meatballs", 45, "Dinner")

# Sample Output
print("Canteen Items Details:")
print("Snack Details:")
snack.display()
print("
Beverage Details:")
beverage.display()
print("
Meal Details:")
meal.display()
```

This code creates a base class `Item` with private attributes for name, price, quantity, and expiration date. It also has a `display` method to print these details. The `Snack`, `Beverage`, and `Meal` classes inherit from `Item` and add their own specific attributes. The `display` method is overridden in `Beverage` and `Meal` to include these additional details. The sample input and output show how to create objects of these classes and display their details.

Knowee AI · Accepted Answer