离散傅立叶变换的实现,基本功能：构造一个CFourior类的对象。-Discrete Fourier transform realization of the basic functions: to construct a CFourior class object.

The Fast Fourier Transform (FFT) is one of the rudimentary operations in field of digital signal and image processing. Some of the very vital applications of the fast fourier transform include Signal analysis, Sound filtering, Data compressio