Is there anything wrong with std::pow?

P

Peng Yu

Hi,

The output of the following program is
(-27.7128,16) (-9.09495e-12,32768)

Obviously, y*y*y is not equal to x, even the magnitude is off. I'm
wondering what is wrong here.

Thanks,
Peng

#include <complex>
#include <iostream>

int main () {
std::complex<double> x(2, 2);
std::complex<double> y = std::pow(x, 1/.3);
std::cout << y << " " << y * y * y << std::endl;
}
 

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