Recall The Function From Homework 4, Problem 1 642803

Problem 1recall The Function From Homework 4 Problem 1 That Gives Dis

Recall the function from Homework 4, Problem 1 that gives discounts to frequent shoppers based on their level. As a reminder: A store gives discounts to frequent shoppers based on their past level of purchases; they are either "silver" level, "gold" level, or "platinum" level. Silver level frequent shoppers receive a 15% discount, gold level frequent shoppers receive a 20% discount, and platinum level frequent shoppers receive a 30% discount. All other shoppers receive no discount. Use funct_play2 to develop a C++ function get_discount that, given a string representing the level of frequent shopper, returns the appropriate discount for that level written as a decimal fraction. (It should return a discount of 0 if the shopper level is not one of those noted above.) You are expected to make and use a named constant for each of the three shopping-level discount values, and make sure you provide sufficient examples/tests.

Submit your resulting get_discount.cpp, get_discount.h, and get_discount_ck_expect.cpp files.

Paper For Above instruction

The function get_discount is designed to determine the discount rate applicable to a shopper based on their membership level. These levels include "silver", "gold", and "platinum," each associated with a specific discount rate. If a shopper's level does not correspond to these categories, the function should return 0, indicating no discount. To implement this, the function uses a straightforward string comparison approach, facilitated by the funct_play2 framework, which helps in avoiding explicit conditional statements like if or switch. This design ensures clean, readable code while maintaining clarity in the logic flow.

In the implementation, it's essential to define named constants for each discount rate. This enhances code clarity and makes future modifications easier. For instance, constants such as SILVER_DISCOUNT = 0.15, GOLD_DISCOUNT = 0.20, and PLATINUM_DISCOUNT = 0.30 can be declared in the header file, ensuring they are accessible throughout the implementation files. The function then compares the input string against the expected membership levels, returning the corresponding discount constant if a match is found, or 0 otherwise.

Providing comprehensive tests is a critical aspect of the implementation. Examples include testing for each valid membership level—"silver", "gold", "platinum"—and an invalid level such as "bronze" or any unrecognized string. These tests verify that the get_discount function correctly returns the corresponding discount rates and appropriately returns 0 for unknown levels, ensuring robustness and correctness of the function.

Overall, this approach emphasizes clarity, maintainability, and correctness, leveraging constants for clarity and avoiding complex conditionals by using the helper function framework. Such a design aligns with best practices in modular C++ programming, facilitating easy updates and testing.

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