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c language. A complex number N is defined as: N = x + iy , where...

c language. A complex number N is defined as: N = x + iy ,
where x is the real part and y is the imaginary part.
The power of N is real and defined as: N^2 = x^2 + y^2, Write a function called cpower that returns the power of complex number. The function takes in x and y as double values and returns the power as a double value.
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