Lære Challenge: Rectangle Area Calculator

Challenge Overview:

You will create a function to calculate the area of a rectangle. The function must throw a custom exception, NegativeDimensionException, if either the width or the height provided is negative. This ensures that only valid, non-negative dimensions are used in area calculations.

Key Points:

Define a custom exception class: NegativeDimensionException;
Calculate the area using width and height;
Throw the exception if width or height is negative;
Return the area for valid dimensions.

Example Usage:

try {
    int area = rectangleArea(5, -2);
    // This line will not execute because an exception is thrown
} catch (const NegativeDimensionException& e) {
    std::cout << e.what() << std::endl; // Output: Rectangle dimensions must be non-negative.
}

Opgave

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Create a function that calculates the area of a rectangle, ensuring both dimensions are valid.

Your task:

Write a function that returns the area of a rectangle using the provided width and height;
If either dimension is negative, throw a custom exception to prevent invalid area calculations;
Use a custom exception class with a clear error message to indicate the problem.

Follow these requirements:

Define a custom exception class for negative dimensions;
Implement the area calculation function;
Throw the exception if any dimension is negative;
Return the calculated area if both dimensions are valid.

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Sektion 2. Kapitel 4

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Suggested prompts:

Can you show me how to define the NegativeDimensionException class?

How should the rectangleArea function be implemented?

What should the exception message say when thrown?

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