FFT is just a computer fast algorithm of DFT. The results are the same as DFT. They are widely used in signal processing and have relevant examples in the program. I hope to help you

Filename	Size	Update
Matrix.h	10546	2003-03-17
OComm.h	2117	2002-05-31
Transform.h	1294	2002-05-31
举例\FourierSeriesApproach.cpp	686	2002-11-26
举例\FourierTransform.cpp	1519	2002-11-26
举例\SievingABR.cpp	1198	2002-11-26
举例\SievingKalman.cpp	2057	2002-11-26
举例\Smooth5_3.cpp	507	2002-11-26
举例\WalshTransform.cpp	405	2002-11-26
举例\Chap15.dsp	4501	2002-10-27
举例\Chap15.dsw	535	2002-07-17
Comm.inl	2220	2002-05-31
Matrix.inl	26598	2002-05-31
Transform.inl	8414	2002-05-31
举例\Chap15.ncb	107520	2002-10-27
举例\Chap15.opt	54784	2002-10-27
举例\Debug
举例

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