#ifndef _FFT_HELPER_HH_7543285760478075043
#define _FFT_HELPER_HH_7543285760478075043
class FFTHelper
{
private:
	void bitrp(double* xreal, double* ximag, int n);
public:
	int FFT(double* xreal, double* ximag, int len);
	int IFFT(double* xreal, double* ximag, int len);
};

#endif