Swappable Behavior With an Interface

The interface IDiscount declares int Apply(int price). Complete NoDiscount (returns the price unchanged) and HalfOffDiscount (returns half the price). The Checkout.Total method delegates to whichever discount it is given. Do NOT write a Main method.

For price 100 with a half-off discount, then with no discount, the program prints the output shown in Expected Output.

Expected Output:

50↵
100↵

= newline. The output ends with a newline — print one after the last line.

Hints2 available

Topics:

Interfaces

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