用if else和Switch语句输出关于商品折扣计算

如果你需要通过 `if-else` 和 `switch` 语句来计算商品折扣，通常会根据不同的折扣条件来设定。这里是一个简单的例子：

# 定义商品原价和折扣规则
price = 100
discount_conditions = {
    "new_product": 0.95,   # 新品折扣
    "seasonal_sale": 0.85,  # 季节性促销
    "bulk_purchase": 0.9,   # 批量购买折扣
    "none": 1                # 没有折扣
}

# 使用 if-else 来计算折扣
if "new_product" in discount_conditions:
    discount_amount = price * discount_conditions["new_product"]
elif "seasonal_sale" in discount_conditions:
    discount_amount = price * discount_conditions["seasonal_sale"]
elif "bulk_purchase" in discount_conditions:
    discount_amount = price * discount_conditions["bulk_purchase"]
else:
    discount_amount = price

# 或者使用 switch 语句（某些编程语言如Java、C#支持）
discount_amount = price
switch (discount_condition_key):  # 假设discount_condition_key存在上述字典中
    case "new_product":
        discount_amount *= discount_conditions["new_product"]
    case "seasonal_sale":
        discount_amount *= discount_conditions["seasonal_sale"]
    case "bulk_purchase":
        discount_amount *= discount_conditions["bulk_purchase"]
    default:
        discount_amount = price

# 输出折扣后的价格
final_price = price - discount_amount
print(f"折扣后的价格为: {final_price}")