Compute Area Through an Interface

The interface IShape declares double Area(). The Rectangle class stores a width and height. Complete Area() so it returns width times height. Do NOT write a Main method.

For a Rectangle with width 3 and height 4 the program prints the output shown in Expected Output.

Expected Output:

12↵

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

Hints2 available

Topics:

Interfaces

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