how to use fft in c++

[Progressive]

Hi,

I have a c++ file with octave embedded in it. Calculating via Matrices and
so on works fine but I don't get it how do I use functions, e.q. the fft in
c++ / upon variables from/in c++ ?

The documentation
https://www.gnu.org/software/octave/doc/v4.0.1/Signal-Processing.html just
tells fft(x).

Just briefly: I have an array in c++ and I want to apply fft on it. How do I
do that?

Thank you very much!



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