Circle Area from Radius

Read a floating-point radius from input and print the area of the circle with exactly 2 decimal places. Use the value 3.14159 for pi and the formula area = pi * r * r. For example, if the input is:

2

print:

12.57

Use <iomanip> with fixed and setprecision(2).

Expected Output:

12.57

Topics:

User Input

Code Editor

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Your Output

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Test Cases

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