Practice/Amazon/Design a Pizza Billing System

Design a Pizza Billing System

Object Oriented DesignMust

Problem

Design and implement an object-oriented pizza ordering system that calculates the total cost of a pizza based on its base type and selected toppings. The system should support multiple pizza varieties, each with its own base price, and allow customers to customize their order by adding various toppings, each with its own additional cost.

Your implementation should use proper OOP principles including encapsulation and allow for easy extension of pizza types and toppings in the future.

Requirements

1. Create a Pizza class that represents a pizza order
2. The class should accept a base pizza type during initialization (e.g., "Margherita", "Pepperoni", "Veggie")
3. Implement a method to add toppings to the pizza
4. Implement a method to calculate and return the total price
5. Create a helper function calculatePizzaPrice that takes a pizza type and list of toppings, returning the formatted price as a string with 2 decimal places
6. Handle invalid pizza types gracefully by returning "0.00"

Constraints

• Pizza base prices range from $8.00 to $12.00
• Topping prices range from $0.50 to $2.00
• Pizza type and topping names are case-sensitive strings
• The output price should be formatted as a string with exactly 2 decimal places
• Maximum of 10 toppings per pizza
• The system should support at least 3 base pizza types and 6 topping options

Examples

Example 1:

Input: pizza_type = "Margherita", toppings = [] Output: "8.00" Explanation: A basic Margherita pizza with no additional toppings costs exactly the base price of $8.00

Example 2:

` Input: pizza_type = "Margherita", toppings = ["extra_cheese", "mushrooms", "olives"] Output: "11.25" Explanation: Starting with a Margherita base ($8.00), we add:

• extra_cheese: $1.50
• mushrooms: $1.00
• olives: $0.75 Total: $8.00 + $1.50 + $1.00 + $0.75 = $11.25 `

Example 3:

Input: pizza_type = "Pepperoni", toppings = ["jalapenos", "extra_cheese"] Output: "12.00" Explanation: Pepperoni base costs $10.00, plus jalapeños ($0.50) and extra cheese ($1.50) = $12.00