添加 6.py

2025-07-06 22:31:32 +08:00 · 2025-07-06 22:31:32 +08:00 · 126795a8ca
commit 126795a8ca
parent 319f1be9c3
1 changed files with 138 additions and 0 deletions
--- a/6.py
+++ b/6.py
@ -0,0 +1,138 @@
+class Product:
+    def __init__(self, product_id, name, base_price):
+        # 封装基本属性
+        self._product_id = product_id
+        self._name = name
+        self._base_price = base_price
+    
+    @property
+    def product_id(self):
+        return self._product_id
+    
+    @property
+    def name(self):
+        return self._name
+    
+    @property
+    def base_price(self):
+        return self._base_price
+    
+    def calculate_price(self, quantity=1):
+        """计算商品价格（基础实现）"""
+        return self._base_price * quantity
+    
+    def display_info(self):
+        """显示商品信息"""
+        return f"{self._name} (ID: {self._product_id}) - ${self._base_price:.2f}"
+
+
+class DigitalProduct(Product):
+    def __init__(self, product_id, name, base_price, license_type):
+        super().__init__(product_id, name, base_price)
+        # 添加数字商品特有属性
+        self._license_type = license_type
+    
+    @property
+    def license_type(self):
+        return self._license_type
+    
+    def calculate_price(self, quantity=1):
+        """数字商品价格计算（无数量折扣）"""
+        # 数字商品购买数量只能是1
+        return self._base_price
+
+
+class PhysicalProduct(Product):
+    def __init__(self, product_id, name, base_price, weight):
+        super().__init__(product_id, name, base_price)
+        # 添加实体商品特有属性
+        self._weight = weight
+    
+    @property
+    def weight(self):
+        return self._weight
+    
+    def calculate_price(self, quantity=1):
+        """实体商品价格计算（有批量折扣）"""
+        if quantity >= 10:
+            return self._base_price * quantity * 0.9  # 10件以上9折
+        return self._base_price * quantity
+
+
+class ShoppingCart:
+    def __init__(self):
+        # 使用字典存储商品和数量 {product: quantity}
+        self._items = {}
+    
+    def add_item(self, product, quantity=1):
+        """添加商品到购物车"""
+        if not isinstance(product, Product):
+            raise ValueError("只能添加Product类型商品")
+        
+        if product in self._items:
+            self._items[product] += quantity
+        else:
+            self._items[product] = quantity
+    
+    def remove_item(self, product, quantity=1):
+        """从购物车移除商品"""
+        if product in self._items:
+            if self._items[product] <= quantity:
+                del self._items[product]
+            else:
+                self._items[product] -= quantity
+    
+    def calculate_total(self):
+        """计算购物车总价"""
+        total = 0
+        for product, quantity in self._items.items():
+            total += product.calculate_price(quantity)
+        return total
+    
+    def display_cart(self):
+        """显示购物车内容"""
+        if not self._items:
+            print("购物车是空的")
+            return
+        
+        print("购物车内容:")
+        for product, quantity in self._items.items():
+            price = product.calculate_price(quantity)
+            print(f"- {product.name} × {quantity}: ${price:.2f}")
+        print(f"总计: ${self.calculate_total():.2f}\n")
+
+
+# 使用示例
+if __name__ == "__main__":
+    # 创建商品
+    book = PhysicalProduct("B001", "Python编程书", 39.99, 0.5)
+    movie = DigitalProduct("D001", "科幻电影", 12.99, "永久")
+    headphone = PhysicalProduct("E001", "无线耳机", 89.99, 0.2)
+    
+    # 创建购物车
+    cart = ShoppingCart()
+    
+    # 添加商品
+    cart.add_item(book, 2)
+    cart.add_item(movie)
+    cart.add_item(headphone, 3)
+    
+    # 显示购物车
+    cart.display_cart()
+    
+    # 测试移除商品
+    print("移除一副耳机...")
+    cart.remove_item(headphone)
+    cart.display_cart()
+    
+    # 测试批量折扣
+    print("添加10本书...")
+    cart.add_item(book, 10)
+    cart.display_cart()
+    
+    # 显示商品信息
+    print("\n商品详细信息:")
+    print(book.display_info())
+    print(movie.display_info())
+    print(f"耳机重量: {headphone.weight}kg")
+    print(f"电影授权类型: {movie.license_type}")