快速傅立叶变换（FFT）算法实现 将DFT算法与FFT算法计算时间进行比较，分析二者的效率和精确差异。-Fast Fourier Transform (FFT) algorithm to DFT algorithm and FFT algorithm for computing time to carry out comparative analysis between the two differences in the efficiency and precision.

在VC++中实现基2时间抽取的FFT（快速傅里叶变换）算法.-In VC++ In time taken to achieve the base 2 of the FFT (Fast Fourier Transform) algorithm.