Price Decorators

The decorator pattern adds behaviour by wrapping an object in layers. Each layer here changes the price of the layer inside it.

Start from base_price and apply the decorators in order:

• discount p: reduce the price by p percent.
• tax p: increase the price by p percent.
• shipping a: add a fixed amount a.
• coupon a: subtract a, but never go below 0.

Implement price_decorators(base_price, decorators).

Input

base_price: The starting price.

decorators: The layers, in the order they wrap the price. Amounts may have decimals.

Output

Return the final price. Answers within 1e-6 are accepted.

เงื่อนไข

0 ≤ base_price ≤ 1,000,000

0 ≤ number of decorators ≤ 100; 0 ≤ p ≤ 100, 0 ≤ a ≤ 100,000

ตัวอย่าง

อินพุต:
base_price = 100
decorators = ["discount 10", "tax 8", "shipping 5"]

ผลลัพธ์ที่คาดหวัง:
expected = 102.2

อินพุต:
long long base_price = 100;
std::vector<std::string> decorators = {"discount 10", "tax 8", "shipping 5"};

ผลลัพธ์ที่คาดหวัง:
double expected = 102.2;

อินพุต:
long base_price = 100;
string[] decorators = new string[] {"discount 10", "tax 8", "shipping 5"};

ผลลัพธ์ที่คาดหวัง:
double expected = 102.2;

อินพุต:
base_price = 20
decorators = ["coupon 25", "shipping 4"]

ผลลัพธ์ที่คาดหวัง:
expected = 4.0

อินพุต:
long long base_price = 20;
std::vector<std::string> decorators = {"coupon 25", "shipping 4"};

ผลลัพธ์ที่คาดหวัง:
double expected = 4.0;

อินพุต:
long base_price = 20;
string[] decorators = new string[] {"coupon 25", "shipping 4"};

ผลลัพธ์ที่คาดหวัง:
double expected = 4.0;

แหล่งอ้างอิง

โจทย์นี้ปรับให้เหมาะกับ CodeUtility กรุณาทำตามคำชี้แจงและข้อจำกัดด้านบน

• Refactoring.Guru, Design Patterns
• Gamma, Helm, Johnson, Vlissides, Design Patterns: Elements of Reusable Object-Oriented Software